SDF(service data flow) are used to map packets to the TFT(traffic flow template) based on 5 tuples and TFT is responsible for maping packet to the respective bearer which matches the QOS of bearer and the packet.
What is SDF in 5G?
Each application interaction requires an end-to-end packet flow, which is called a Service Data Flow (SDF). In this example, there would be four SDFs to the internet DN, one for each application within one PDU session. Each SDF can be associated with a 5G QoS Flow with a specific QoS definition that can be assigned.
What is traffic flow template in LTE?
A traffic flow template (TFT) is an information element that specifies parameters and operations for a Packet Data Protocol (PDP) context. … The packet filters determine the traffic mapping to PDP contexts. Ideally, the network uses the downlink packet filters while the mobile stations use the uplink packet filters.
What is QoS in LTE?
QoS Class Identifier (QCI) is a mechanism used in 3GPP Long Term Evolution (LTE) networks to ensure bearer traffic is allocated appropriate Quality of Service (QoS).
What is MBR LTE?
MBR is used for a GBR type bearer, and indicates the maximum bit rate allowed in the LTE network. Any packets arriving at the bearer after the specified MBR is exceeded will be discarded.
What is AMF in 5G?
With the functionality of the 4G Mobility Management Entity (MME) now decomposed, the 5G Core Access and Mobility Management Function (AMF) receives all connection and session related information from the User Equipment (UE) (N1/N2) but is responsible only for handling connection and mobility management tasks.
What is PDU session in 5G?
Like previous generations, a 5G network connects user equipment (UE) to external data networks. The 5G connectivity service is named PDU Session. From a transport point of view, a PDU session is made by a sequence of NG tunnels in 5GC, and of one or more radio bearers on the radio interface.
What is IP session?
An IP-CAN session is established after a primary Packet Data Protocol (PDP) context initiated by the UE is activated. When a subscriber goes online, the subscribers UE initiates the IP-CAN session establishment flow. … The UE sends an Activate PDP Context Request message to the serving GPRS support node (SGSN).
What is a bearer in LTE?
In a mobile network using the Long Term Evolution (LTE) architecture, bearers are the tunnels used to connect the user equipment to Packet Data Networks (PDNs) such as the Internet. In practice, bearers are concatenated tunnels that connect the user equipment to the PDN through the Packet Data Network Gateway (P-GW).
What is RRC in LTE?
The Radio Resource Control (RRC) protocol is used in UMTS, LTE and 5G on the Air interface. It is a layer 3 (Network Layer) protocol used between UE and Base Station. … RRC messages are transported via the PDCP-Protocol.
How does handover work in LTE?
Handover procedures are a key function of LTE eNBs. They are intended to reduce interruption time compared to the circuit-switched handover process in 2G networks. … Handover within an E-UTRAN. The procedure for when a UE is leaving a cell managed by the eNB and entering a cell managed by a second eNB.
What is APN in LTE?
Within the Long Term Evolution (LTE) network infrastructure are many LTE identifiers that help move things along. … Access Point Name (APN) is an identifier that lives in the LTE core network, otherwise known as the Evolved Packet Core (EPC).
What is ARP in LTE?
The allocation and retention priority (ARP) indicates a priority level for the allocation and retention of bearers. The mobile network uses ARP to decide whether to accept a request to establish a bearer, or reject the request when resources are limited.
What is GBR and non GBR bearer in LTE?
Dedicated bearers can be either GBR (Guaranteed Bit Rate) or non-GBR. … A GBR bearer has a guaranteed bit rate and MBR (Maximum Bit Rate) while more than one non-GBR bearer belonging to the same UE shares an AMBR (Aggregate Maximum Bit Rate).