To deliver a better quality voice signal, mobile service providers must consider how the signal is delivered from the handset, through the access portion of the network, and then through the mobile core. Unfortunately, although each stage of the call is important, mobile service providers cannot control the quality of every end user’s handset. Fortunately, they can control the radio portion of their network, which requires its own approach to quality assurance and which service providers have addressed with RF planning.
Service providers can also control the quality of the signal through the mobile network core, which offers significant opportunity for enhancement. With Adaptive Multi-Rate Wideband (AMR-WB), a new speech coding standard commonly referred to as high definition (HD) voice, service providers can provide better fidelity voice signals from handsets and deliver CD quality voice to end users through mobile networks. But even with this new codec, the challenge is to deliver HD Voice end-to-end for all voice calls on an ongoing basis, and in a way that optimizes the network to ensure continuing profitability.
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