Flexible QoS Mapping Configuration for 5G Data Transmission
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Solution Overview
Problem
In 5G NR systems, the independent nature of NAS and AS reflective QoS mappings makes it difficult for terminal devices to determine the states of both mappings using a single 1-bit RQI, leading to challenges in configuring flexible QoS mapping relationships for data transmission.
Innovation Solution
A data transmission method that determines the working mode of the RQI in downlink data packets to independently configure the first and second mapping relationships from IP flow to QoS flow and QoS flow to DRB, respectively, allowing for flexible configuration of mapping rules by determining whether these relationships satisfy reflective QoS mappings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single 1-bit RQI is used to indicate both NAS and AS reflective QoS states, then the signaling overhead is reduced, but the terminal device cannot independently determine the states of both mappings
Solution Approach 1:
The patent segments the QoS mapping determination into two independent parts: NAS mapping (IP flow to QoS flow) and AS mapping (QoS flow to DRB). Each mapping can be independently activated or deactivated based on the RQI value, allowing the terminal device to independently determine the state of each mapping relationship rather than treating them as a single unified state.
2Adaptability or versatility
If NAS and AS reflective QoS mappings are made independent, then flexible configuration of mapping rules is achieved, but the complexity of determining mapping states increases
Solution Approach 1:
The patent introduces dynamic working modes for the RQI that can be flexibly configured. The network device can switch between different working modes (first working mode for NAS mapping, second working mode for AS mapping, or third working mode for both) based on actual network conditions and service requirements, making the system adaptable rather than static.
Solution Approach 2:
The patent changes the interpretation parameter of the RQI based on the working mode. The same 1-bit RQI value can have different meanings depending on the configured working mode, allowing the system to flexibly configure mapping rules without changing the underlying bit structure or adding significant complexity.
3Productivity
If the RQI indicates both NAS and AS reflective QoS simultaneously, then the data transmission efficiency is improved, but the accuracy of determining individual mapping states deteriorates
Solution Approach 1:
The patent segments the indication function of the RQI into separate working modes. In the first working mode, the RQI specifically indicates NAS mapping state; in the second working mode, it specifically indicates AS mapping state; in the third working mode, it indicates both. This segmentation allows accurate determination of individual mapping states while maintaining efficient single-bit signaling.
Data Source
AI summary
Embodiments of the present disclosure relate to a data transmission method, a terminal device and a network device. The method includes: receiving a downlink data packet transmitted by a network device, where the downlink data packet includes an RQI; determining a working mode of the RQI, where the working mode of the RQI is used to determine an indication content of the RQI, the indication content includes whether a first mapping relationship and/or a second mapping relationship satisfies a reflective QoS mapping; determining the first mapping relationship and the second mapping relationship of an uplink data packet according to the working mode of the RQI and the RQI. The terminal device may determine, according to the RQI of only 1-bit, whether the first mapping relationship and the second mapping relationship of the uplink data packet to be transmitted to the network device satisfy the reflective QoS.