Session‐based end‐to‐end policy control in 3GPP evolved packet system

Abstract

The Third Generation Partnership Project specifies a solution to handle the heterogeneity of future networks, including quality of service (QoS) and charging aspects. This solution utilizes a policy-based approach based on the policy and charging control (PCC) architecture, which is an integral component of the evolved packet system (EPS). The specifications for EPS are being finalized with the evolved packet core (EPC) central to this framework. The EPC is a simplified, flat, all IP-based architecture that supports mobility between heterogeneous access networks and incorporates an evolved QoS concept based on the PCC framework. A critical open issue within EPS is the provisioning of end-to-end QoS enabled paths. This article proposes enhancements to the EPC/PCC framework that extend the end-to-end inter-domain mechanisms to discover the signaling routes at the service control layer, and use this information to determine the paths traversed by the media at the resource control layer. Because the approach operates at these layers, it is compatible with existing transport networks and exploits already existing QoS control mechanisms. A real testbed implementation, comprising free and open source software, is used to evaluate the proposed mechanisms. The obtained results show that the framework has an acceptable effect on session setup delay and core traffic overhead in a range of scenario ranging from simple, to typical, to worst case

Toward open service access to policy and charging control in evolved packet system

“…The extended architecture gives application developers greater control over the way the services are treated in the transport layer. Good et al [14] suggest enhancements to the PCC framework that extend the end-toend inter-domain approaches to discover the signalling routes at the service control layer, and use this to determine the paths traversed by the media at the resource control layer. Because the approach operates at these layers, it is compatible with existing transport networks and exploits already existing QoS control mechanisms.…”

“…The most promising approach to cope with such a challenge is the Evolved Packets System (EPS). EPS covers the radio access, the core network and the devices that comprise the overall mobile system [14]. The radio access enables multimedia services with high throughput and low-latency requirements [12] and adopts secure media distribution [17], while the core network provides functions for management and enforcement of service and bearer level policies such as QoS [1,11].…”

QoS‐based radio network dimensioning for LTE networks with heavy real‐time traffic

“…In formulating the analytical model to study packet delays, we consider a single cell with a base station serving multiple connections with different services sharing a common scheduler over the air interface, as depicted in Figure . The 3GPP Release 8 LTE specifications include nine standardized QCIs, where each standardized QCI is associated with standardized QCI characteristics in terms of service type (guarantee bit rate (GBR) versus non‐GBR), priority, packet delay, and packet‐error‐loss rate . QCI‐1 to QCI‐4 are classified as GBR services, because each of them comes with their respective delay budget.…”

“…The 3GPP Release 8 (Rel‐8) Long Term Evolution (LTE) wireless broadband standard has gained considerable attention from the telecommunication industry recently because of its capability of providing faster mobile broadband services and simpler QoS management . The 3GPP Rel‐8 LTE standard defines nine standardized QoS class identifier (QCI) values with standardized characteristics for different types of services .…”

Parlay X Web Services for Policy and Charging Control in Multimedia Networks

“…Good et al [8] suggest enhancements to the PCC framework that extend the end-to-end inter-domain mechanisms to discover the signaling routes at the service control layer and use this to determine the paths traversed by the media at the resource control layer. Because the approach operates at these layers, it is compatible with existing transport networks and exploits already existing QoS control mechanisms.…”