- This topic has 5 replies, 1 voice, and was last updated 14 years, 9 months ago by
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Hi,
Could any one of u explain me about AMRFR and how to implement it in my network.
We use Ericsson BTS.
Hi,
Adaptive multi rate, gives good speech quality at low SS, increase your retainability consequently traffic increase and lower the TCH drop rate.
You need to purchase AMR licenses from E\\.But when should i use AMRFR and AMRHR?
Adaptive Multi Rate (AMR) is a speech and channel codec for both half rate and full rate. By adapting the codec rate to the radio conditions the speech quality is enhanced. At low C/I, a large amount of channel coding is applied and less speech coding. When the C/I increases the speech coding is increased and the channel coding is decreased.
Both the BTS (uplink ) and the MS (downlink) continuously measures the radio quality (C/I) and based on these measurements the codec rate is changed. AMR requires support in all network nodes, i.e. MSC, BSC, BTS and MS and AMR is only supported in cells where all TRUs are AMR capable.
Hi,
by putting amr in network capacity point of view any gain?
@Thomas Tukai
If I am not wrong, this is a line by line copy from Alex. 🙂 hehehe
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