slow wifi on telecoms VDSL

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BDFL - Memuneh
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#879764 16-Aug-2013 19:58

If you have a problem with WiFi interference, adding another repeater will probably just make it a bigger problem...

sbiddle

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#879765 16-Aug-2013 19:58

kiwirock: Sorry for confusion (I'm an ex broadcaster), I think in Watts mroe often than dBW or dBm.

You'll see in the spec sheet the TX Power section for say 802.11g, it says the max output is 30dBm. That's around 1 Watt or 1,000 milliwatts. You can google a dBm to watt conversion chart.

A cheap Netgear/Cisco home router or Belkin etc... only put out about 16 to 18dBm. It's not even half the output power, it's even less, under 100 milliwatts as dB is logarithmic not linear.

So a 1 Watt access point is much better at sending a strong signal than 0.1W. Higher output is better than higher gain antenna when in a bad interference environment. But it will also make it worse on other neighbours around you.

The issue with WiFi isn't so much a signal strength issue, it's the 802.11b beacons flooding the airwaves. You can have a scenario where there may be a 15dB difference between the signal and noise floor which should in theory deliver an OK signal but with all those beacons flying around the air 802.11 simply can't work efficiently. You also have to remember WiFi is a half duplex PHY layer, something most people forget. TCP performance will always be less than UDP performance.

Quite simply the easiest way to look at WiFi in a crowded space is to use the example I've already mentioned. 2 people in a room with 10 other people talking can easily have a conversation with each other. 2 people in a room with 100 people talking will find it virtually impossible to have a conversation.

I deal with the dramas of a 300+ apartment building on a daily basis. Trying to explain the limitations of WiFi to the average person is very challenging because they simply don't understand the limitations of the PHY layer and basic physics.

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#879767 16-Aug-2013 20:03

Bigfox: thats a cool thing.So i can just plug a repeater in this power adapter and force other signals out?sounds like a plan=)do i need two of these things or only one?

The job of a repeater is to pick up a wireless signal and retransmit it, halving your speed in the process. A repeater isn't what you want here.

Adding a powerline adapter and another AP will simply make your noise issues worse.

My solution to your problem would be to get a Ruckus AP with beam forming. I'd virtually guarantee it'll give you 100Mbps UDP / 50Mbps on both 2.5Ghz and 2.4Ghz to your devices for the low cost of around $2000.

Reanalyse

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#879769 16-Aug-2013 20:06

They come in pairs usually, and basically at each end have an ethernet socket and a power outlet. If your TV has an ethernet connection plug one unit (master) in to your router with an ethernet cable, and connect the other one (slave) to the TV ethernet port.

Or if you want you could use the output at the slave end to connect to a WiFi AP which would give you a lot of signal where you need it (i.e in a lounge or bedroom)

Suggest you go to an online PC store and read the descriptions there.

Regards

Inphinity

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#879770 16-Aug-2013 20:07

I'm still confused about what on earth media you're streaming that even your 7mbps wifi connection is not coping with - if it is actually sustaining 7mbps that should be plenty, most media streams at <5mbps. As an aside, I'm only getting about 15/10 over wifi on my S4 as well. The Lumi a 520 is not far behind and the iFail is at 10/7. I have mine set more for coverage rather than throughput though, and those speeds are pretty consistent throughout the property and can stream anything I've ever found.

Bigfox

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#879774 16-Aug-2013 20:11

my inssider can spot 17 aps including mine.So if repeater will make it only worse what can i do?because i have a desktop connected in one room and all my gadgets which need fast wi fi in another room.i dont need much just at least 20 mb wi fi.Because most of them i cant connect to the wire...but power line adapter is a beatiful solution for tv so we can watch youtube in 1080p!!!!but ipad and laptop?because 7 is ok for the phone(sometimes get apps from play store) but ipad and laptop is another story.I study on my laptop and do other 1000 things on it and i can feel that i am lagging.Ipad is a problem as well.when i check facebbok i can see that i have to wait for the net to download the pictures...and it can take like 9 seconds for one picture.

Summary of potential solution which will help

1)tv-power line adapter and use ethernat cable to it.enjoy max speed on tv
2)ipad- no solution.enjoy max speed i can get out of 5ghz network
3)laptop- no solution.enjoy max speed i can get out of 2.4ghz as 5 is not supported by my card
4)phone- i am ok with any speed

Bigfox

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#879783 16-Aug-2013 20:45

But I don't live in 300 apartments building.it has 2 apartments on every floor of total 12 floors.its not a hotel or students building.apartments price starts from 260k for 1 bedroom and over 400 for 3 bedroom.its not like Princeton,volt or anything like that.but why my 5ghz interfer with other signals?inssider doesn't show any 5 networks and I don't think I have anything in the apartments which works on that frequency.sorry for asking too many questions.thats why I am not planning on working in that area.one of my majors is networking and telecommunications.was going to get Cisco certificate.ccna one but need to do complete ccna4 chapter for it.but what I learnt is different from what I need to know to make my wi fi works lol

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michaelmurfy

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#879807 16-Aug-2013 21:32

Since I had the same problem as you here's my setup:

Basically the xDSL comes via a master filter into my DGND3700v2 which is connected straight to a powerline adapter. Since our house is large I have 4 of these total, one behind my room TV connected to a switch which links to the TV, my server, Raspberry Pi. Another which links into my bedside SIP Phone and the third for the lounge TV. I use 5GHz WiFi where possible and the only device connected to 2.4GHz WiFi is my laptop (of which I need to upgrade the WiFi card of) - the whole setup cost approx $600 but can be moved from house to house and means I don't have to put up with the 17 WiFi networks running on the 2.4GHz band messing with our speeds, complaining flatmates and cables all over the house. As you can see there our router is in the kitchen and the whole setup is very tidy.

Tilt head sideways, the GZ photo gallery doesn't see my photo as being the right way around >.<

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Referral Links: Quic Broadband (use R122101E7CV7Q for free setup)

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Bigfox

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#879830 16-Aug-2013 22:12

I see but that solves the problem only if those devices can be connected through the cable.but what's about 5ghz?why my speed is low on 5GHz?slow I mean it doesn't use the whole bandwidth available which is 32-34 in my case?and why I get a speed which fluctuates a lot(by more than 10mb)I used dsl-N55a adsl router which worked with telecoms modem in a bridge mode.used channel 48.the rest was the same.please advice

Inphinity

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#879835 16-Aug-2013 22:22

If you haven't, try disabling the 2.4GHz AP on the N55U, so you only have the 5GHz AP active, set for N-only and 40Mhz, and try a beacon interval of 75.

Bigfox

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#879838 16-Aug-2013 22:30

Should I also wait for 10 days before I switch off the modem or I can just go ahead and connect asus again and do manipulations?

michaelmurfy

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#879933 17-Aug-2013 08:35

Bigfox: I see but that solves the problem only if those devices can be connected through the cable.but what's about 5ghz?why my speed is low on 5GHz?slow I mean it doesn't use the whole bandwidth available which is 32-34 in my case?and why I get a speed which fluctuates a lot(by more than 10mb)I used dsl-N55a adsl router which worked with telecoms modem in a bridge mode.used channel 48.the rest was the same.please advice

I said I mostly used 5GHz. The power line adapters connect to devices further away from the AP.

Like 2.4GHz change the channel to the one that works best, but don't do too much within the first 10 days of DLM or if you do make sure you're quick and know what you're doing at the time to prevent too much disconnections. You might find one that works better than the rest. It also depends on signal strength also for example, if I'm upstairs on 5GHz it can drop back it's speeds to just 10mbit at times. When your signal drops on devices the speeds drop too.

Ragnor

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#880289 17-Aug-2013 19:56

Bigfox:

Summary of potential solution which will help

1)tv-power line adapter and use ethernat cable to it.enjoy max speed on tv
2)ipad- no solution.enjoy max speed i can get out of 5ghz network
3)laptop- no solution.enjoy max speed i can get out of 2.4ghz as 5 is not supported by my card
4)phone- i am ok with any speed

For your laptop you could get a USB Wireless Adapter that supports 5Ghz eg:
http://www.tp-link.com.au/products/details/?categoryid=2164&model=TL-WDN3200
http://pricespy.co.nz/product.php?p=1208538

Goonertron

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#880999 19-Aug-2013 13:36

I think it is more to do with Telecom sending you a s****y $40 router. We signed up for UFB, the person on the phone said they would give us a business grade router and today a tp link router turned up that was significantly worse than our 5 year old thomson router. The wifi range was so bad I couldn't even load up speedtest plugged in the old router in the same spot and got 5mbps wifi. It's terrible that telecom seem to put out worse routers each year. UFB with a $40 router and no antenna is just criminal.

Inphinity

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#881003 19-Aug-2013 13:44

Goonertron: I think it is more to do with Telecom sending you a s****y $40 router. We signed up for UFB, the person on the phone said they would give us a business grade router and today a tp link router turned up that was significantly worse than our 5 year old thomson router. The wifi range was so bad I couldn't even load up speedtest plugged in the old router in the same spot and got 5mbps wifi. It's terrible that telecom seem to put out worse routers each year. UFB with a $40 router and no antenna is just criminal.

The OP has already said he has tried using his existing Asus DSL-N55U for the wifi. The N55U is dual-band N600 capable. And to be fair, the TG589vn is actually decent (though it's wifi performance pales compared to the N55U).

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