Uplink QoS Flow Identification via DRB Mapping
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Solution Overview
Problem
In New Radio (NR) systems, identifying the Quality of Service (QoS) flow for uplink transmission is challenging, leading to increased air interface overhead as terminal devices need to carry QoS flow IDs, which complicates the mapping process.
Innovation Solution
A method where terminal devices determine the identification manner for QoS flows based on mapping relationships between QoS flows and Data Radio Bearers (DRBs), using zero-bit identification, specific bit-length identification information, or QoS flow IDs, to reduce air interface overhead by determining the correct QoS flow for data packets carried in DRBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices carry QoS flow IDs in data packets for uplink transmission, then the QoS flow can be identified, but air interface overhead increases
Solution Approach 1:
The patent extracts the QoS flow identification function from the data packet payload and relocates it to the DRB configuration layer. By removing the need to carry QoS flow IDs in every data packet, the solution eliminates the overhead while maintaining identification capability through the mapping relationship between DRBs and QoS flows established in configuration signaling.
Solution Approach 2:
The patent introduces DRB configuration information as an intermediary between the terminal device and QoS flow identification. This intermediary contains the mapping relationships that enable the network device to determine QoS flow without requiring explicit identification in data packets, thus resolving the contradiction between reliable identification and reduced overhead.
2Quantity of substance
If terminal devices use zero-bit identification for QoS flows, then air interface overhead is reduced, but the mapping complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the mapping relationships between DRBs and QoS flows through configuration signaling before data transmission occurs. This preliminary configuration allows the terminal device to use zero-bit identification during actual transmission, as the mapping information is already prepared and stored in the network device, eliminating the need for complex real-time mapping decisions.
3Productivity
If multiple QoS flows are mapped to one DRB, then resource utilization improves, but QoS flow identification becomes more difficult
Solution Approach 1:
The patent implements feedback mechanisms where the network device provides configuration information containing mapping relationships back to the terminal device. This feedback loop enables the terminal to accurately identify QoS flows even when multiple flows share a DRB, as the mapping information is explicitly provided and maintained through the configuration signaling process.
Data Source
AI summary
Provided in embodiments of the present application are an uplink transmission method, terminal device and network device. The terminal device can mark a quality of service (QoS) flow mapped by data carried in a data radio bearer (DRB). The method comprises: a terminal device determining, according to a first mapping relationship, a marking form of a first quality of service (QoS) flow corresponding to a data packet carried in a first data radio bearer (DRB), the first mapping relationship being a mapping relationship between the QoS flow and the DRB; according to the marking form of the first QoS flow, marking the first QoS flow corresponding to the data packet carried in the first DRB; and transmitting the marked data packet through the first DRB to a network device.