5QI table
A 5QI table, or 5G QoS Identifier table, is a table that maps a 5QI value to a set of QoS characteristics. Each QoS characteristic has a default value, but the value can be overridden by the network operator. The 5QI table is used by the 5G Core Network (5GC) to determine the QoS that should be provided to a user equipment (UE) for a particular traffic flow.
Here is an example of a 5QI table:
| 5QI | Resource Type | Default Priority Level | Packet Delay Budget | Packet Error Rate | Maximum Data Burst Volume |
|---|---|---|---|---|---|
| 1 | GBR | 1 | 10 ms | 10^-3 | 150 KB |
| 2 | GBR | 2 | 20 ms | 10^-4 | 300 KB |
| 3 | Non-GBR | 3 | 50 ms | 10^-5 | 500 KB |
| 4 | Non-GBR | 4 | 100 ms | 10^-6 | 1 MB |
| 5 | Delay Critical GBR | 1 | 1 ms | 10^-7 | 50 KB |
| 6 | Delay Critical GBR | 2 | 2 ms | 10^-8 | 100 KB |
| 7 | Delay Critical GBR | 3 | 5 ms | 10^-9 | 200 KB |
| 8 | Delay Critical GBR | 4 | 10 ms | 10^-10 | 400 KB |
In this table, the 5QI value is used to identify the type of traffic flow. For example, a 5QI value of 1 is typically used for GBR (Guaranteed Bit Rate) traffic, which is traffic that requires a minimum guaranteed bandwidth. A 5QI value of 3 is typically used for non-GBR traffic, which is traffic that does not require a minimum guaranteed bandwidth. A 5QI value of 5 is typically used for delay critical GBR traffic, which is GBR traffic that must be delivered with a very low latency.
The Resource Type column specifies the type of resource that is being used to deliver the traffic flow. For example, the Resource Type can be GBR, non-GBR, or Delay Critical GBR.
The Default Priority Level column specifies the priority level that is assigned to the traffic flow. The priority level is used by the 5GC scheduler to determine the order in which traffic flows should be scheduled.
The Packet Delay Budget column specifies the maximum amount of time that a packet can be delayed before it is considered lost.
The Packet Error Rate column specifies the maximum acceptable packet error rate for the traffic flow.
The Maximum Data Burst Volume column specifies the maximum amount of data that can be sent in a burst.
The 5QI table is an important tool for network operators because it allows them to control the QoS that is provided to UE. By carefully selecting the 5QI values that are used for different types of traffic, network operators can ensure that UE receive the QoS that they need for their applications.