SDAP Layer Uplink Data Processing Without RQI
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Solution Overview
Problem
Current data transmission in New Radio (NR) wireless communication systems lacks an effective uplink transmission control solution for Service Data Adaptation Protocol (SDAP) layer Protocol Data Units (PDUs, which affects real-time data processing performance.
Innovation Solution
A method for a terminal to receive and process Service Data Units (SDUs) from the application layer into SDAP PDUs, which are then sent to a low-layer entity, utilizing a preset format configured by the RRC layer to improve real-time data processing efficiency and consistency, without requiring a Reflective Quality of Service Indicator (RQI) in uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SDAP layer processes uplink data packets with reflective QoS indicators, then QoS mapping accuracy is improved, but data processing time increases
Solution Approach 1:
The patent extracts and removes the Reflective QoS Indicator (RQI) field from the SDAP PDU structure for uplink transmissions. By taking out this unnecessary element, the patent eliminates the processing overhead associated with RQI handling while maintaining QoS functionality through alternative mechanisms, thus resolving the contradiction between QoS mapping accuracy and data processing time.
Solution Approach 2:
The patent inverts the conventional approach by not requiring RQI in uplink transmissions despite downlink packets containing RQI. Instead of having the terminal process RQI from downlink packets and generate corresponding RQI for uplink, the patent uses implicit QoS mapping where the terminal directly maps uplink QoS flows based on pre-configured rules, thereby reducing processing time while maintaining accuracy.
2Reliability
If the SDAP PDU includes RQI bits for uplink transmission, then QoS reflective control is improved, but packet size increases
Solution Approach 1:
The patent removes the RQI bits from the uplink SDAP PDU structure, extracting only the necessary elements for QoS control. This reduces the packet size by eliminating redundant RQI fields while maintaining QoS reflective control through alternative mechanisms such as pre-configured QoS rules and implicit mapping relationships.
Solution Approach 2:
The patent uses lightweight, disposable QoS identification mechanisms instead of persistent RQI bits in every uplink packet. By using compact QoS flow identifiers and pre-configured rule sets, the patent achieves effective QoS control with minimal overhead, effectively replacing bulky RQI fields with more efficient, compact alternatives.
3Productivity
If the terminal processes SDAP SDU in real-time to generate SDAP PDU, then data processing efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring QoS mapping rules, data radio bearer associations, and packet filtering criteria before actual data transmission. The terminal stores these pre-configured parameters and uses them for rapid real-time QoS decision-making, thereby improving processing efficiency while reducing the complexity of real-time processing operations.
Solution Approach 2:
The patent enables the terminal to autonomously perform QoS mapping and packet processing using pre-configured rules without requiring complex real-time interactions with the network. The terminal's SDAP layer independently handles QoS flow identification, packet filtering, and bearer mapping based on stored configuration, reducing processing complexity while maintaining high efficiency through self-service mechanisms.
Data Source
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AI summary
Disclosed in embodiments of the present application are a data transmission control method and a related product. The method comprises: an SDAP layer entity of a terminal receives an SDAP service data unit (SDU) from an application layer; the SDAP layer entity processes the SDAP SDU to obtain an SDAP protocol data unit (PDU); and the SDAP layer entity sends the SDAP PDU to a lower layer entity. According to a transmission method for an SDAP PDU without carrying RQI, the real-time performance of data processing of an SDAP layer on a terminal side is improved.