Introduction to Voice over LTE
The Policy and Charging Rules Function (PCRF) is a key element that enables the transition to and reliable operation of Voice over LTE (VoLTE) services.
But with critical voice services now sharing the pipe with other data services like web browsing, video and social media, the ability to manage the speed, quality, volume and Diameter signaling associated with VoLTE is critical to providing a differentiated experience.
Additionally, although the LTE network provides a framework for signaling application QoS, CSPs need to verify the actual quality experienced by subscribers who have purchased VoLTE services.
There is also an opportunity for CSPs to consolidate their control plane architecture with a PCRF element that can leverage the LTE QoS architecture to enable such use cases such as WebRTC, gaming, and unified fixed and mobile policy control. A capable PCRF offers CSPs the opportunity to save costs and deploy additional revenue-generating services that capitalize on the new QoS control capabilities of the LTE network.
Voice over LTE: Challenges and Opportunities
This paper first presents a crash course in VoLTE, and then explores the challenges and opportunities associated with this emerging technology.
Sandvine’s Service Delivery Engine
The upgrade cycle to support VoLTE can be leveraged by CSPs as an opportunity to consolidate their control plane architecture by introducing a Sandvine’s universal PCRF, the Service Delivery Engine (SDE). The SDE goes beyond enabling VoLTE, to:
- Leverage the LTE QoS architecture to enable use cases including quality-protection for WebRTC, video applications, and gaming services
- Simplify policy control across all access technologies (e.g., 2G, 3G, CDMA, LTE, Cable, DSL, WiFi, etc.), by deploying a single system that can make decisions and enforce policies across multiple standards
In short, Sandvine's SDE offers CSPs the opportunity to save costs and deploy additional revenue-generating services that capitalize on the new QoS capabilities of the LTE network.
VoLTE and the Service Delivery Engine
This paper explains how the Sandvine Service Delivery Engine (SDE) enables the transition to and reliable operation of Voice over LTE (VoLTE) services.