Base Station Reflective QoS Management via Selective SDAP Header Configuration
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Solution Overview
Problem
Current methods for managing uplink quality of service (QoS) in 5G mobile communication networks are inefficient, particularly when using the control plane to configure reflective QoS, as they result in wastage of radio resources and increased complexity due to the need to transmit QoS flow IDs (QFI) for all packets, even when only a specific QoS flow is applicable.
Innovation Solution
Implement a method where the base station (BS) selectively sets the reflective QoS indicator (RQI) and/or QoS flow ID (QFI) in the Service Data Adaptation Protocol (SDAP) header only for packets that require it, using a timer to manage the lifetime of QoS rules and reducing the frequency of setting RQI and QFI, thereby optimizing resource usage and reducing battery consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control plane is used to configure reflective QoS by transmitting QFI for all packets, then QoS management is achieved, but radio resources are wasted and system complexity increases
Solution Approach 1:
The patent applies local quality by making the QFI transmission selective rather than universal. The base station determines whether to include QFI in the SDAP header based on specific conditions (whether the UE has stored QoS rules matching the current packet). This means QFI is transmitted only where needed (local requirement) rather than in all packets, thereby reducing overall radio resource consumption while maintaining QoS management effectiveness.
Solution Approach 2:
The patent implements partial action by transmitting QFI only for a subset of packets rather than all packets. The base station performs partial transmission of QFI information based on whether the UE has relevant QoS rules stored. This partial transmission approach is sufficient to maintain QoS management while avoiding the excessive resource consumption of universal QFI transmission.
2Reliability
If QFI is transmitted in SDAP header for all packets, then reflective QoS is maintained, but device complexity and processing burden increase
Solution Approach 1:
The base station applies local quality by making its processing effort proportional to the actual need. It checks whether the UE has stored QoS rules that match the current packet and only transmits QFI when necessary. This selective approach reduces the base station's processing burden while maintaining reflective QoS integrity for packets that require it.
Solution Approach 2:
The UE serves itself by maintaining stored QoS rules that allow it to independently determine QoS requirements for certain packets. This self-service capability reduces the need for continuous base station intervention and QFI transmission, thereby reducing base station processing complexity while maintaining QoS integrity through the UE's own rule-based determination.
3Measurement precision
If RQI and QFI are set frequently in SDAP header, then QoS flow identification is accurate, but radio resources are consumed unnecessarily
Solution Approach 1:
The patent implements periodic action by having the UE maintain stored QoS rules that are periodically updated and used for packet classification. Instead of requiring continuous QFI transmission with every packet, the UE uses its stored rules periodically to determine QoS requirements, reducing the frequency of RQI and QFI setting in the SDAP header while maintaining accurate QoS flow identification.
Solution Approach 2:
The UE performs preliminary action by pre-storing QoS rules before packets arrive. These pre-stored rules allow the UE to independently identify QoS flows without requiring frequent QFI transmission from the base station. This preliminary preparation reduces the need for continuous RQI and QFI setting, thereby reducing radio resource consumption while maintaining identification accuracy.
Data Source
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AI summary
A disclosure of the present specification provides a method for managing uplink quality of service (QoS) by a base station. The method may comprise the steps of: determining whether a timer, driven by a terminal in relation to reflective QoS, has expired; during driving of the timer of the terminal, transmitting multiple packets within a traffic flow, to which the reflective QoS is applied, without setting at least one of a reflective QoS indication (RQI) and a QoS flow ID (QFI) for the multiple packets therewithin; and before expiration of the timer being driven by the terminal, setting at least one of the RQI and the QFI for at least one packet within the traffic flow and transmitting the set packet.