 filters filters e2e payload e2e payload relay 3GPP SDAP 3GPP SDAP Encap (GTP-U Encap (GTP-U 37.324 37.324 or other) or other) 3GPP PDCP 3GPP PDCP 38.323 38.323 3GPP RLC 3GPP RLC IPv4/6 IPv4/6 38.322 38.322 3GPP MAC 3GPP MAC 802.3 MAC 802.3 MAC 38.321 38.321 3GPP PHY 3GPP PHY 802.3 PHY 802.3 PHY 38.211/2 38.211/2 Packets marked with QFI FIGURE 2-10 Relationship between radio bearer (DRB) over the air and QFI backhaul QoS definition 3GPP). DRB, digital radio bearers; QFI, QoS flow Id; QoS, Quality of Service. Maximum Packet Loss Rate for both uplink and downlink Delay-Critical Resource Type Notification Control For Non-GBR QoS flows: Reflective QoS Attribute Additional QoS Flow Information The following table defining 5QI options is defined in 3GPP 23.501. A few examples are copied next: Packet Default Default Default delay Packet maximum averaging Resource priority budget error data burst window value level volume Example services Conversational voice Nonconversational video (buffered streaming) Non-GBR Video (buffered streaming), TCP-based (e.g., www, e- mail, chat, ftp, p2p file sharing, progressive video, etc.) Non-GBR V2X messages (Continued) Chapter 2 System components, requirements, and interfaces 55 (Continued) Packet Default Default Default delay Packet maximum averaging Resource priority budget error data burst window value level volume Example services Delay- 1354 Bytes V2X messages (advanced critical driving: collision avoidance, platooning with high Levels of Automation (LoA)) The 5QI equivalent in 4G/LTE is defined as the QoS Class Identifier (QCI) which is also a scalar value associated with a bearer that defines the traffic type and expected service. A comparison between 4G/LTE and 5G/NR parameters is shown in Table 2 1. The mapping between traffic categories and DiffServ code points is implementation- specific but done based on 5QI and PL (per 3GPP 38.414). Recommendations have been published by IETF. Reflective Quality of Service Optionally supported by UEs, the reflective QoS concept tells the U