What is the GX-GY interface?
Asked by: Demetris Shanahan | Last update: August 26, 2025Score: 4.8/5 (8 votes)
What is the GX interface in LTE?
The Gx interface connects the PCRF with policy enforcement points. These are found in the packet core of 3G and 4G networks. The serving GPRS support node (SGSN), gateway GPRS support node (GGSN), and PDN Gateway are all considered as enforcement points, supported by the Gx interface.
What is the GX protocol?
Gx is an application of the Diameter Base Protocol (RFC 6733). As shown in Gx reference point, Gx is placed between a policy server Policy and Charging Rule Function (PCRF) and a traffic forwarding node Policy and Charging Enforcement Function (PCEF) that enforces rules set by the policy server. Figure.
What is the gy interface in 5G?
Gy interface is a reference point between the mobile network gateway element (e.g. PGW in 4G and UPF in 5G), and the Online Charging System (OCS). Gy interface is used in real-time charging and credit control, allowing mobile network operators to effectively manage and monetize the subscriber's data usage.
What is the GI interface in LTE?
In the LTE EPC, the Gi interface is located between the PDN Gateway (PGW) and the external PDN. The PGW acts as the gateway that connects the EPC with external networks, while the external PDN could be the internet, corporate networks, or other public or private IP networks.
Part 27 - S7 | Gx | LTE EPC Protocols | LTE EPC Architecture | LTE EPC Overview | LTE | EPC | 4G |
What is GX and GY in telecom?
Gx interface enables signaling of PCC decisions, negotiation of IP-CAN bearer establishment mode and termination of Gx session . Gy. It is online charging reference point. Gy lies between PCEF (Policy Control Enforcement Function) and OCS (Online Charging Function).
What is GY interface in LTE?
Gy interface is for online charging. For policy, there is another interface called Gx, that we will discuss in another tutorial. For charging, PCEF interacts with the OCS, sends the charging events to OCS, and receives events and answers. OCS is an online charging system.
What is the difference between 4G and 5G interfaces?
Connectivity. 5G can support up to 100 times as many devices and endpoints as 4G. This means 5G is ready to support the next generation of user growth and the millions of IoT (Internet of Things) devices expected to come online in the near future.
What is gy application?
The Gy interface is a component in the 3GPP-defined online charging system (OCS), connecting the Policy and Charging Enforcement Function (PCEF) to the Online Charging System (OCS). This interface is responsible for enabling real-time, session-based charging in mobile networks.
What is the difference between GX and GY?
The GX modifiers are not needed for services that are considered statutorily noncovered, or that do not meet the definition of a Medicare benefit. GY modifier is added to claims in which the item or service is statutorily excluded, does not meet the definition of any Medicare benefit.
What is the function of PCRF in LTE?
The Policy and Charging Rules Function (PCRF) shall balance network utilization and ensure appropriate conditions for any application, resulting in a scalable, efficient infrastructure for efficient control and utilization.
What is the S9 interface in LTE?
The S9 interface allows the PCRF to support LTE roaming services such as Voice over LTE. This is done be establishing S9 and Rx sessions between the Home PCRF (H-PCRF) and the Visiting PCRF (V-PCRF).
What is the difference between LTE and G?
4G is significantly faster. LTE offers only 100 Mbps, while true 4G offers up to 1,000 Mbps. However, if we take a look at the LTE-A speeds, the difference disappears as it also offers 1,000 Mbps. As a result, there is no clear answer as it depends on which technology you are using, LTE or LTE-A.
What is interface in 5G?
The 5G air interface is a key part of the 5G system which will facilitate Enhanced Mobile Broadband and Ultra Reliable Low Latency Communication, as well as the support of Massive MTC (Machine Type Communications).
What is the difference between 5G and 4G beamforming?
5G delivers a step change in network performance over current 4G levels, with peak data rates up to 20 times faster at 20 GB/s, and connection densities of 1000 devices per square kilometre, 100 times more than 4G.
Why am I getting 4G instead of 5G?
Because 5G VoNR is not fully covered yet, and some models do not support VoNR yet, the call will use VoLTE over 4G instead of 5G. This means the phone will switch from 5G to 4G during the call. After the call ends, 5G will resume as normal. This is normal, please don't worry.
Is there a 6G network?
No, 6G is not yet available, but 6G networks are currently in development and expected to launch around 2030.
Is 4G still good in 2024?
If we look at 3G as an example of what we might expect, it took over two decades from its commercial launch in 2001 to the beginning of its phase-out in the US in 2022. If 4G has as good a run as 3G did, then we won't have to worry about the 4G phase-out until close to the year 2030.
What is the GX interface?
Gx is a reference point in the network architecture model describing mobile service delivery. The network elements are described in various technical documents under the umbrella of 3GPP and are used to deliver, manage, report on and charge end-user traffic for mobile users.
What is a GY interface?
The Gy interface is the online charging interface between the PCEF/GW (Charging Trigger Function (CTF)) and the Online Charging System (Charging-Data-Function (CDF)). The Gy interface makes use of the Active Charging Service (ACS) / Enhanced Charging Service (ECS) for real-time content-based charging of data services.
What is a messaging interface?
The messaging interface simplifies application development by moving function from the application program into a database structure. The three essential parts of the messaging interface syntax are the service, the policy, and the message. The service defines where to send the message.
What is the GA interface in LTE?
Ga interface is the interface between the mobile network elements that generate the CDRs, and the Charging Gateway (CG). Ga interface uses GTP' protocol in its application layer. This protocol enables seamless transfer of the CDRs between the mobile network elements and the CG.
What is PCRF in LTE?
Policy and Charging Rules Function (PCRF) is the software node designated in real-time to determine policy rules in a multimedia network. As a policy tool, the PCRF plays a central role in next-generation networks.
What is default vs dedicated bearer in LTE?
Default bearers support only best effort traffic but they can be used also by the UE to require other bearers for specific traffic flows. Dedicated Bearer:which guarantees different level of QoS to the traffic flows, defining a sort of tunnel between UEs and PGWs.