WB-AMR gains traction in the UK

WB-AMR, or it's marketing term HD voice, has had a hard time gaining traction. The codec is a wideband one, meaning that at the input phase it samples from a wider frequency range thus reproducing much better audio quality on the receiving end.

I have actually participated in WB-AMR trials and was also impressed by its near "spooky" clarity. It does actually sound as if the person was sitting right next to you.

Orange UK launched the service (only on their 3G network) a few months ago and it is nice to see that they have been adding more handsets from different manufacturers (see this link)

What is the non-DRX timer in GPRS?

Here is some low level detail about the way GPRS works. The non-DRX timer and T3314 are negotiated between the MS and the SGSN during the Attach procedure and then subsequently during Routing Area Updates. The MS can propose values but the SGSN can override these.

T3314 optimisation can reduce paging load considerably. Non-DRX timer optimisation can reduce latency in the downlink.

Welcome to the radio access blog

This is the first post of the radio access blog. The blog will provide short tutorials and discussions on radio access topics for GSM, EGPRS, UMTS and LTE networks. It will also include note worthy news clippings that can form the basis of discussions and tutorials.

Click the Home button below to view the latest blog entry.