Charging Data Function (CDF) in Mobile Network
CDF stands for "Charging Data Function". It is a key component in the mobile network charging and billing architecture.
The CDF is responsible for collecting charging data records (CDRs) from various network elements. These CDRs contain information about the usage of network resources by the network users.
Then the CDF aggregates and correlates the collected CDRs. It then transfers the processed CDRs to the Charging Gateway Function (CGF).
In most cases the CDF is integrated into the network elements that generate CDRs, such as the GGSN, the S-GW, or the P-GW.
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Offline Charging vs. Online Charging in LTE
The type of charging in LTE mobile network, may be Offline Charging or Online Charging. The main difference between the two types, is whether the charging can affect the user data session in real time or not. Offline Charging can not affect the user data session in real time. While the online charging can affect…
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What is an ‘EPS Bearer’ in LTE ?
During 'LTE attach' procedure, the network establishes this EPS Bearer between the UE and the PGW. The PGW assigns an IP address for this Bearer. The UE uses this IP address, in order to communicate with the PDN. In addition, the PGW assigns a QoS for this Bearer, which guarantees the QoS for the data…
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QoS ‘Quality of Service’ in GPRS
QoS refers to 'Quality of Service'. After 'PDP context activation' procedure completes, a 'PDP context' shall exist on the MS, the SGSN, and the GGSN. In addition, the GGSN assigns a QoS for this 'PDP context'. This QoS describes the priority that the nodes shall give to traffic belonging to this 'PDP context'. The subscription…
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