Top message: WHY SAMSUNG!! by Elnegro54
Replying to: Re: HSDPA vs EVDO by rytr23
well, I hate to nitpick, but voice is data.
Not when it comes to cellular networks... or any kind of telecom. Yes, it's all digital at some point, but there's a huge difference between circuit switching and packet switching, and a huge difference betweeen IP and non-IP.
also, HDSPA has a theoretical peak of 14.4 Mbs down.
No, it doesn't. That's essentially a myth. There's a standards group that has said in theory, they think they could develop something based on HSDPA that would go that fast, but the current version of HSDPA has a theoretical peak rate of 3.6 Mbps.
And tI know the requirement of EvDo to have a dedicated 1.25 mhz I don;t know how you mean the GSM/WCDMA networks "seperate" the "3G" traffic I could very well be uninformed on that.
WCDMA (and HSDPA, etc.) requires at least 5 MHz of dedicated spectrum, totally separate from spectrum used for GSM or anything else. It usually requires "guard bands" of empty spectrum above and below that 5 MHz as well.
Also, EvDO rev0 does not have significantly faster uplink speed. RevA will complete the the up and down inprovement
Yes, although actually EVDO has zero improvement in upload speed compared to 1xRTT.
Hence EvDO Rev0 kinda like HSDPA ... thats down and is faster up (2Mb theoretically vs .15Mb)
That 2 Mbps is another myth. Actual (peak, theoretical) uplink speed for the current version of HSDPA is 128-384 kbps, depending on implementation.
and EvDO RevA(3.1 down/1.8 up) almost like HSDPA/HSUPA(14.4 down/5.75 up)
HSDPA+HSUPA will in fact be on par with EVDO rA. The speeds will be quite close.
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