QoS Indication for Encrypted Application Data Units in 5G
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Solution Overview
Problem
Existing extended reality (XR) services face challenges in delivering quality of service (QoS) for encrypted application data units (ADUs) due to E2E encryption blinding transparent proxy and deep packet inspection functions, leading to erroneous scheduling decisions in 5G core networks, resulting in latency issues and inefficient resource allocation.
Innovation Solution
A method that involves generating extended IP packets with a second information element indicating QoS requirements based on a first information element within received IP packets, allowing for transparent transmission and scheduling optimization within the 5G core network and radio access network, enabling efficient resource allocation and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If E2E encryption is applied to protect data security, then security against man-in-the-middle attacks is improved, but QoS inspection capability deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism (information element in IP packet headers) that allows QoS parameters to be transmitted through the encrypted channel without compromising security. The intermediary carries QoS information in a format that can be inspected by network nodes while the actual application data remains encrypted.
2Reliability
If E2E encryption is applied to protect data privacy, then security is improved, but scheduling decision accuracy deteriorates
Solution Approach 1:
The information element acts as a mediator that conveys QoS scheduling information through the encrypted data stream. Network nodes can read the QoS parameters from this intermediary structure without needing to decrypt the actual application data, thus maintaining both security and scheduling accuracy.
3Ease of operation
If transparent proxy and DPI functions are used to inspect QoS, then QoS management is improved, but encryption effectiveness deteriorates
Solution Approach 1:
The information element serves as a transparent intermediary that allows proxy and DPI functions to access QoS information without breaking encryption. The QoS data is carried in a standardized format that can be inspected by network management functions while the application layer encryption remains intact.
4Productivity
If IP packets are split from video frames, then network transmission efficiency is improved, but QoS tracking accuracy deteriorates
Solution Approach 1:
The patent applies segmentation by dividing video frames into multiple IP packets, each containing an information element that tracks the QoS requirements. The segmentation is performed in a way that preserves QoS information across packet boundaries, allowing accurate tracking even when packets are split and reassembled.
Solution Approach 2:
The information element in each IP packet header acts as an intermediary that carries QoS tracking information. This allows the network to maintain accurate QoS metrics for each original video frame even after it has been segmented into multiple packets for transmission.
Data Source
AI summary
A technique for forwarding an application data unit, ADU, within a telecommunications system comprising a radio access network, RAN, for transmission to an end terminal through the RAN is disclosed. The transmission of the ADU to the end terminal is subject to a quality of service, QoS, requirement. As to a method aspect of the technique, at least one internet protocol, IP, packet comprising at least one information unit of the ADUIs received. The at least one IP packet further comprises a first information element indicative of a packaging of information units of the ADU into IP packets. The first information element of the received at least one IP packet is read. At least one extended IP packet comprising a second information element indicative of the QoS requirement of the at least one extended IP packet based on the first information element is generated. The at least one extended IP packet further comprises the received at least one IP packet. The at least one extended IP packet is forwarded to the RAN.