Long Term Evolution (LTE) is the 4th generation broadband technology for mobile. LTE has been developed by 3GPP in release 8 technical specifications (R8). The LTE facilitates QoS to be guaranteed through EPS and Quality of service class identifier (QCI).
Papers:
ETSI TR 102 805-1 V1.1.1: “User Group; End-to-end QoS
management at the Network Interfaces; User's E2E QoS -
Analysis of the NGN interfaces (user case)”.
ETSI TS 103.189: “End-to-end QoS assessment for VoLTE and RCS Interop Events”.
For mobile operators, Voice over Long Term Evolution (VoLTE) has emerged as the preferred solution for enabling real time voice traffic in the emerging world of all-IP networks. When this transition is complete, the circuit-switched network for voice communications (in which a dedicated circuit path is reserved for each call) will be replaced by an all-IP network in which flow-based QoS informs network resources of quality requirements to ensure call quality. The motivation to completely transition to this all-IP approach is strong: Until mobile operators can operate real time IP voice services that meet the high expectations for call quality and reliability set by traditional circuit-switch networks, they will be burdened with the huge capital and operating expenses of maintaining two separate networks.
This is the reason why ABI research predicted that by the end of 2014, VoLTE subscribers are expected to be 59.6 million, and that by 2019 nearly 56 percent of LTE-related cellular subscriptions will be using its services.
For VoLTE you're late, it's done. For 5G QoS you're early, but there are early deployments to watch.
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