Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


paradoxsm

3000 posts

Uber Geek

Trusted

#7563 24-Apr-2006 19:07
Send private message

Does anyone know first off if moving about cellsites affects your mobile data connection while it re-establishes a connection or whether it's just a seamless merge and doesn't affect a continuous stream of data...

Does anyone know if either UMTS, EVDO, 1RXTT had problems with jitter as this is also very important.

I am doing some serious testing in the next few days so any info would be a great help!

I once had high hopes for Woosh but this locks onto one cellsite so when it's out of range, it just drops. Kinda pointless.
I'm trying to decide if with all factors* taken into account, I'll stick with Vodafones UMTS or Telecoms EVDO (unless the latter is free ;-)




*(I know Telecoms is faster, Vodafone have handsets, blah blah blah So I don't want yet another "T'Com VS V'Fon" forum)


PS: we need a "general Mobile" forum to put posts like these in.

Create new topic
Jama
1420 posts

Uber Geek

Trusted

#33789 24-Apr-2006 19:30
Send private message

CDMA has soft handover - you acquire cell site B before you handover from cell site A. I have seen no discernable difference in latency or packet loss - mobile vs stationary.

1xRTT - only hands up to EVDO when dormant
EVDO - hands down to 1xRTT when active and can take a few seconds (if you were pinging you would see a timeout)

timbosan
1716 posts

Uber Geek


#33791 24-Apr-2006 19:35
Send private message

I cannot help with the UMTS, EVDO, 1RXTT (sorry!) but I know GPRS has seemless handovers, I have never lost a signal whilst moving, except if there is no signal at all!

Are you going to let us in on what you are testing for?  It all sounds very interesting!

 
 
 
 


Jama
1420 posts

Uber Geek

Trusted

#33793 24-Apr-2006 19:38
Send private message

GPRS uses hard handover. It can be quite abrupt and it can cause a delay.

paradoxsm

3000 posts

Uber Geek

Trusted

  #33795 24-Apr-2006 19:42
Send private message

Cheers, Jama great info, Yes have found GPRS while it keeps connection takes about 10 seconds to re-establish anything, ins rather reliable (better than phone call GSM handovers!) but ultra slow for latency and throughput..

CDMA all uses the 800MHz band am I correct? This is probably enough of a feature in itself, Means antenna design is easy as (025 antenna's are a-plenty) as it does not need dual frequencies.

Jama
1420 posts

Uber Geek

Trusted

  #33796 24-Apr-2006 19:46
Send private message

All 800MHz and in the same part of the spectrum. Antenna's are the same for 1xRTT and EVDO. It does pay for EVDO to have antenna diversity ( Rx and Rx/Tx).

paradoxsm

3000 posts

Uber Geek

Trusted

  #33798 24-Apr-2006 19:54
Send private message

Well WHAT will I use it for.....

VoIP (not just italk and similar IF it will function but also conference calling via an office/network of work vans)

Video Conferencing and live broadcasting from remote areas (Jama, What is EVDO's upload speed?) UMTS does not cut the cheese here, 40Kbps (64Kbps maximum) was too just too jerky and grainy and coverage is an issue.

Remote site monitoring using some data connection for high res images and low-res (352x288) video, Already running images over GPRS, we also tried PXT but some reason the uploads were even slower! (Class 10 GPRS) 2T 3R

A "Mobile webcam" which if we can get it to work will follow someones tour throughout the country. Need to get hands on a harrier and see if something can be written to use it soley as a broadcasting handheld camera.

Just playing about at present aside the remote monitoring but still cool.Laughing







sbiddle
29213 posts

Uber Geek

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  #33806 24-Apr-2006 22:34
Send private message

Sounds like you obviously need to get a job, you obviiously have far too much spare time on your hands to be playing with VoIP stuff all day!! :-)


 
 
 
 


paradoxsm

3000 posts

Uber Geek

Trusted

  #33809 24-Apr-2006 23:08
Send private message

Looks like from next week I am again full time empolyed hence the sudden rush!,,,, Watch this space.

Been doing contract work for the past 8 or so weeks hence travelling all over sth island last week and getting to fiddle with some cool stuff. (what a glorious trip it was :-)

paradoxsm

3000 posts

Uber Geek

Trusted

#34078 27-Apr-2006 02:58
Send private message


Winner of Mobile data tests for my purposes.................... Telecom EVDO. hands down.

Speed was quite a bit higher.

upload seemed just as fast as download, no 64k upload choke like UMTS

The 800 MHz had way better building/hill penetration and wider general coverage than the 2GHZ UMTS.

Dropping down to 1RXTT from EVDO was fast, Automatic.

Cellsite EVDO - EVDO "Handovers" were seamless with Telecom, Got a bit of jitter from UMTS.

Battery life was better.

mobile broadband alerts available to avoid those nasty overage surprises

The bad....

Poor selection of devices (good devices, just not many of em and expensive) Data card, Sanyo, Two HTC PDA's

Not transferable to another phone without having network based change done, Wap not included (but is on PDA's through PIE's wap support)

I wish they had released this prior to my Sth Island trip, GPRS was just painfully slow, reliable old horse, but sl ow ow w


Telecom, Yellow is "3G" Coverage Vodafones, Yellow Ochre is "3G" coverage.
Telecom EVDOVodafone UMTS


I'm in no way bagging Vodaone, it was their only upgrade path and aside from the coverage, they have done a good job of it, "3" in Australia's wasn't nearly so rosy, All sorts of plagued problems and other hideous rubbish.

For the time I have used Voda 3G, I have been impressed, it works close to it's theoretical maxumum 384Kbit almost all of the time.


Now I better get some sleep, I'm tired of dropping people off at silly hours to catch planes!, I should have never sold the 2-seater MR2's, Now i'm a Taxi with my 4 door saloon, I at least had an excuse before Tongue out

nob

nob
1 post

Wannabe Geek


  #35626 13-May-2006 00:26
Send private message

I know with Edge tech. it is completely seamless between edge and gprs.


sbiddle
29213 posts

Uber Geek

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  #35629 13-May-2006 08:01
Send private message

nob:

I know with Edge tech. it is completely seamless between edge and gprs.



EDGE is still the GSM network so that's not surprising. UMTS to GSM means changing networks.




Create new topic




News »

Logitech introduce MX Anywhere 3
Posted 21-Sep-2020 21:17


Countdown unveils contactless shopping with new Scan&Go tech
Posted 21-Sep-2020 09:48


HP unveils new innovations for businesses adapting to rapidly evolving workstyles and workforces
Posted 17-Sep-2020 15:36


GoPro launches new HERO9 Black camera
Posted 17-Sep-2020 09:45


Telecommunications industry launches new 5G Facts website
Posted 17-Sep-2020 07:56


New Zealand ranks 3rd in world in GSMA index
Posted 15-Sep-2020 10:13


Trend Micro Security Suite adds web monitoring to prevent identity theft
Posted 14-Sep-2020 15:37


NVIDIA to acquire Arm for US$ 40 billion
Posted 14-Sep-2020 12:27


Epson launches its next gen A3+ colour EcoTank multi-function printer
Posted 10-Sep-2020 16:08


Sony launches three new native 4K SXRD home cinema projectors
Posted 9-Sep-2020 18:00


Catalyst Cloud brings Kubernetes-based open-source web hosting solution to market
Posted 9-Sep-2020 17:54


Verizon Connect eyes further growth in New Zealand
Posted 8-Sep-2020 09:26


PNY launches XLR8 gaming NVIDIA GeForce RTX 30 series powered by the all-new NVIDIA Ampere architecture
Posted 3-Sep-2020 16:39


NVIDIA delivers greatest-ever generational leap with GeForce RTX 30 Series GPUs
Posted 3-Sep-2020 16:17


Weta Digital advances visual effects and animation in the cloud with AWS
Posted 2-Sep-2020 17:09



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.