Adaptive QoS Rule Bit Allocation for 5G Terminal Data Mapping
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Solution Overview
Problem
In 5G systems, terminal devices face challenges in acquiring correct Quality of Service (QoS) flow identifiers due to limited bit support, leading to incorrect mapping of application layer data to QoS flows.
Innovation Solution
A method and device that determine and indicate QoS rules based on QoS flow attributes, allowing terminal devices to correctly acquire QoS flow identifiers by varying the number of bits occupied by QoS flow identifiers (QFIs) in different rules, enabling accurate mapping and data packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal device uses a fixed 6-bit QFI support, then the device complexity is reduced and ease of operation is improved, but the reliability of QoS flow identification deteriorates when 7-bit QFIs are required
Solution Approach 1:
The patent applies dynamics by making the QFI bit length adaptable rather than fixed. The terminal device dynamically adjusts between 6-bit and 7-bit QFI representations based on the QoS rule type indicated by the network device, allowing the system to switch between different operational modes to resolve the contradiction between ease of operation and identification reliability
Solution Approach 2:
The patent changes the parameter of QFI bit length from a static 6 bits to a dynamic parameter that can be 6 or 7 bits. By indicating different QoS rule types (first type for 6-bit, second type for 7-bit), the system modifies the QFI parameter to match the required precision level, thereby maintaining reliability while preserving ease of operation for standard cases
2Measurement precision
If the network device always uses 7-bit QFI, then the measurement precision of QoS flow identification is improved, but the loss of information increases when terminal devices only support 6-bit QFI
Solution Approach 1:
The patent applies local quality by providing different QFI representations tailored to specific terminal device capabilities and network requirements. Instead of uniformly using 7-bit QFIs everywhere, the system locally adapts to use 6-bit QFIs when terminal devices support them, and 7-bit QFIs when higher precision is needed, thus preventing information loss while maintaining precision where required
Solution Approach 2:
The network device performs preliminary action by indicating the QoS rule type in advance before the terminal device needs to interpret the QFI. This preliminary indication allows the terminal device to prepare the correct bit-length interpretation, preventing information loss by ensuring the terminal device uses the appropriate number of bits to read the QFI value
3Adaptability or versatility
If the terminal device uses reflective QoS rule (first QoS rule), then the adaptability of QoS flow mapping is improved, but the device complexity increases due to dynamic QFI bit determination
Solution Approach 1:
The patent introduces an intermediary mechanism - the QoS rule type indication - that mediates between the network device and terminal device. This intermediary signal tells the terminal device which interpretation mode to use, simplifying the complexity by providing clear guidance rather than requiring the terminal device to independently determine the correct QFI bit length through complex analysis
Data Source
AI summary
Disclosed are a method for transmitting data based on QoS, a network device and a terminal device. The method includes: determining, by the network device according to an attribute of a QoS flow, a QoS rule used by the terminal device for transmitting an uplink data packet; sending indication information to the terminal device, the indication information being for indicating the QoS rule. The network device determines the QoS rule used by the terminal device for transmitting the uplink data packet according to the attribute of the QoS flow. Number of bits occupied by a QFI in different QoS rules is different, so that the terminal device can correctly acquire the QFI based on the used QoS rule and acquires a mapping from application layer data to the QoS flow according to a QFI carried in a downlink data packet, thereby filtering and sending the data packet to be transmitted.