Z3 Dual Wi-Fi - only 72Mbps - Xperia Z3 Q&A, Help & Troubleshooting

My laptop connects with 300Mpbs. But my Xperia connects to the same access point only with 72Mbps.

Mine too.
My original Z did that as well, but my wife's G2, and my dads knock off Chinese phone connect at 150...
Sent from my Nexus 7 using XDA Free mobile app

The Snapdragon Chipset only has one antenna.
Most Phones
N Mode
1 antenna in 20Mhz mode = 72 Mbps Link
1 antenna in 40Mhz mode = 144 Mbps Link (Aka 150)
AC Mode
1 antenna = 433 Mbps Link (I get this as I have an AC router: Netgear R8000)(Z3 gets around 240 Mbps peak transfer speed)
Most Laptops
N Mode
2 antenna in 20Mhz mode = 144 Mbps Link (aka 150)
2 antenna in 40Mhz mode = 288 Mbps Link (aka 300)
AC Mode
2 antenna = 866 Mbps Link (My laptop with Intel 7260AC adapter gets this link)(Gets around 320-400 Mbps peak transfer speed)
Reason for single antenna is to save power. The Snapdragon 810 Chipset will have a 2x2 antenna (aka 2 antenna).
40 Mhz for 2.4Ghz Band is generally not preferred in residential areas with lots of WiFi users/congestion as it uses more channels causing interference and may actually lower your effective range.
This is why older Apple products and Intel adapters at one point did not allow 40Mhz mode for 2.4 Ghz. Modern routers automatically drop to 20Mhz if they are conflicting with your neighbors and many don't let you force 40Mhz mode only supporting auto switching based on interference or the other option being 20Mhz mode, this applies to all Intel adapters as well.
Also these are link speeds not the actual transfer speeds, in N mode my laptop drops from 300 link speed to 240 or 144 due to many neighbors having WiFi. That's why I use 5Ghz N or AC as very few people have this.
Remember actual throughput will always be less than the link speed due to overheads, generally around 60-70% of the link speed with good range/signal.
The best transfer speed on the Z3 at 433 Link speed for me is around 240 MBps.

I still can't understand
1. Why my laptop use 2 antenna in 40Mhz mode = 288 Mbps Link (aka 300) and in the same time my Z3 use 1 antenna in 20Mhz mode = 72 Mbps Link with the same wi-fi access point.
2. And why my Z3 don't use 1 antenna in 40Mhz mode = 144 Mbps Link (Aka 150).

Yeah I get that too, Sony probably did that to avoid interference. Even my dads M8, sisters GS4, mom's iPhone 6 does that.
20Mhz means Less interference so longer range and battery life due to less packet resends. I doubt it would impact you much if at all. If you really want more bandwidth switch to 5Ghz mode though range will be less unless your on 5Ghz AC.
In N mode even my laptop drops link rate from 300 to around 270-144 most of the time because neighbors also use WiFi obviously.

Related

What is your Wireless Transfer Speed ?

Right now I have a wireless G router (LinkSys WRT54G) at home (I'll be getting a Wireless N in a week or so). But for now I'm getting extremely slow transfer speeds when copying files over wi-fi.
When using ES File explorer, I get around 7.5Mbps (Notebook on wired LAN, transformer on Wi-fi)
For speedtest.net I get is 7Mbps, but my notebook clocks 13Mbps over wi-fi.
I don't have another computer with me right now, therefore no way to test PC to PC wireless speed (one on wired, other on wireless). But from the looks of it, transformer is at least 2x slower than my notebook according to speedtest results; but since my ADSL connection max outs at 13Mbps anyways (even over a wired connection), I'm pretty sure that is far lower than the maximum achievable speed with my router. I was expecting speeds in the range of 20Mbps +.
What speeds are you guys getting ?
P.S: Transformer detects the link speed as 54Mbps, all speeds listed above are in Mega Bits Per Second.
Now I can't, but later I'll test this. I have a local caching proxy, so it can cache speedtest data and I've already seen it make a difference. Massive one.
Sent from my GT-P1000 using Tapatalk
I got roughly 20mbps.
Sent from my Transformer TF101 using Tapatalk
I got 53 Mbits/sec on dslreports flash speed test.
I got arround 50mbps, in the wireless information im connected at 72mb/s.

Does anyone's Infinity go higher than 65Mbps? This is nuts

I finally upgrade my network to Gigabit and True dual band N wireless, and I'm trying to get my Transformer Infinity to see higher 802.11n speeds than 65Mbps. I hope this is not another limitation to this tablet, otherwise I'm going to have to get rid of it.
My wireless N speeds are capable up to 450Mbps,
My XPS M1210 laptop with Dell 1500 Draft N card can connect at 270Mbps and I got that laptop back in 2006.
My Blackberry Playbook which is dual band capable (unlike the Transformer) connected easily to the 5GHz broadcast.
My Transformer Infinity is connected to the 2.4GHz band like my laptop and it's disappointing me with this 65Mbps speed.
You're disappointed with 65Mbps? My networks only 20/2 and i'm fine. What do you need more that 65Mbps on a tablet for?
What the heck would you need 450Mbps for? Even if the I/O issue didn't exist, it's still be bloody pointless. It's a waste as a server, p2p doesn't go faster than the seeder's connection, and even for profesisonal online gaming 20Mbps is more than enough.
Please tell me this isn't about "It should be capable because I want it to.".
Wouldn't this be a result of lacking the 5ghz band as well as only having 1 antenna?
Sent from my ASUS Transformer Pad TF700T
I have 192kbps max, count yourself lucky you have even 65mb XD
Sent from my Xperia S using XDA Premium HD app
Am I reading this right?
65mbps? You are mad at that? You can stream 1080p videos without a sweat.
I'm in one floor above my router in my bedroom right now and I'm getting 3mbps (not on an Infinity). Even when I'm ONE FOOT from the router I can't get much more than 20mbps.
Sounds like all he's doing is bragging about his net speed, if that's even true.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
wifesabitch said:
Am I reading this right?
65mbps? You are mad at that? You can stream 1080p videos without a sweat.
I'm in one floor above my router in my bedroom right now and I'm getting 3mbps (not on an Infinity). Even when I'm ONE FOOT from the router I can't get much more than 20mbps.
Click to expand...
Click to collapse
I believe he's talking about the reported connection speed from the network card. The TF is limited to 72mbps and has no 5ghz band. 65mbps connection does not equate to 65mbps transfer. I can generally transfer at no more than about 15mbps down which is significantly slower than my laptop on the same router.
It is unfortunate that they chose to limit it rather than giving us the option to trade off power for speed. I can just barely stream full blu-ray spec video on a good day.
It's highly likely that the TF700 maxes at 65mb. I've never checked my connection speed on the tablet before, but my router transmits at 450mb/s and only my desktop reaches that connection speed because it has a 450mb/s tp-link card. My laptops Intel card maxes at 300mb/s.
Sent from my SPH-D710 using xda app-developers app
-Cupper- said:
You're disappointed with 65Mbps? My networks only 20/2 and i'm fine. What do you need more that 65Mbps on a tablet for?
Click to expand...
Click to collapse
Yes I'm very disappointed, and what I'm about to explain next I hope to at least persuade or at least inform on the details of why 65Mbps is simply not enough for a modern day wireless device.
First I'm not talking about my internet speeds. Is the 20/2 you posted the upload and download speeds from your ISP, well that's ok, it's a little above the nation's average.
When I'm saying my Infinity is only pulling 65Mbps I'm talking about the speed it's achieving from the wireless on my local network.
common speeds are generally 100Mbps for Ethernet if using the an old 10/100Mbit router, and 54Mbps over wireless if using a Wireless G router.
10/100Mbps speeds have been around for more than a decade now and have been succeeded by Gigabit ethernet offering 1000Mbps. Wireless speeds have gone past 54Mbps since 802.11n was officially certified in 2009.
If you stream video from your computer, HTPC, HD Game console (PS3/X360),
Transfer large files between your computers, do any kind of remote desktop, your bandwidth on your local network comes into play.
What I'm trying to do is optimize the performance of Splashtop THD which requires massive bandwidth for streaming games between a PC and a tablet.
Under my old Belkin N150 G+ router I was only getting 65Mbps, which I thought was the max speed that the router would do because my XPS laptop was pulling the same rate over wireless (till I discovered that I never enabled the b/g/n 20/40MHz bandwidth capability on my laptop's network adapter to get higher speeds, so now my laptop is doing 270Mbps on my new N900 router where it initially was doing 130Mbps before I enabled the 20/40MHz)
Looking at the network settings on the Transformer Infinity doesn't have any option for 20/40MHz setting. I already knew it couldn't do dual band and be able to see a 5GHz broadcast but the fact that it's only showing 65Mbps, shows that this device wifi card is even more limited.
When I initially got Splashtop THD installed on my Transformer Infinity to test this out, the lag pretty much killed me let alone the degradation was pretty huge. I later read up from Splashtop support pages that the performance is dependent upon the bandwidth. Which makes since, so I used my D-Link USB ethernet adapter and connected my Infinity over a LAN connection at 100Mbps. This improved Splashtop THD quite a bit, there was still some lag but the quality look decent.
Here are some example screenshots I took of Splashtop THD playing at 100Mbps
http://systemwars.com/forums/index....ss-effect-2-on-my-transformer-infinity-tshbr/
This setup is moot since the device is not mobile anymore since I got it on a 100Mb ethernet adapter. This drove my attention to upgrade to Gigabit and true Wireless N speeds.
Luckily in 2012. Gigabit speeds is a common feature of a $70 price ranged router, but I wanted something more than the typical N300 routers so I got the big daddy N900 so I could do 450Mbps wireless which over 4x the amount I was getting over ethernet.
But sadly my goal is stopped in it's tracks due to the Transformer Infinity having the hardware of a pinto.
How on Earth could anyone think 65Mbps max for Wifi in 2012, on a tablet of all devices is enough.
Hell this puts the Transformer Infinity out of the realm of being a decent streaming media device, when it can't even hang with modern media device's mobile speeds.
the_game_master said:
Yes I'm very disappointed, and what I'm about to explain next I hope to at least persuade or at least inform on the details of why 65Mbps is simply not enough for a modern day wireless device.
First I'm not talking about my internet speeds. Is the 20/2 you posted the upload and download speeds from your ISP, well that's ok, it's a little above the nation's average.
When I'm saying my Infinity is only pulling 65Mbps I'm talking about the speed it's achieving from the wireless on my local network.
common speeds are generally 100Mbps for Ethernet if using the an old 10/100Mbit router, and 54Mbps over wireless if using a Wireless G router.
10/100Mbps speeds have been around for more than a decade now and have been succeeded by Gigabit ethernet offering 1000Mbps. Wireless speeds have gone past 54Mbps since 802.11n was officially certified in 2009.
If you stream video from your computer, HTPC, HD Game console (PS3/X360),
Transfer large files between your computers, do any kind of remote desktop, your bandwidth on your local network comes into play.
What I'm trying to do is optimize the performance of Splashtop THD which requires massive bandwidth for streaming games between a PC and a tablet.
Under my old Belkin N150 G+ router I was only getting 65Mbps, which I thought was the max speed that the router would do because my XPS laptop was pulling the same rate over wireless (till I discovered that I never enabled the b/g/n 20/40MHz bandwidth capability on my laptop's network adapter to get higher speeds, so now my laptop is doing 270Mbps on my new N900 router where it initially was doing 130Mbps before I enabled the 20/40MHz)
Looking at the network settings on the Transformer Infinity doesn't have any option for 20/40MHz setting. I already knew it couldn't do dual band and be able to see a 5GHz broadcast but the fact that it's only showing 65Mbps, shows that this device wifi card is even more limited.
When I initially got Splashtop THD installed on my Transformer Infinity to test this out, the lag pretty much killed me let alone the degradation was pretty huge. I later read up from Splashtop support pages that the performance is dependent upon the bandwidth. Which makes since, so I used my D-Link USB ethernet adapter and connected my Infinity over a LAN connection at 100Mbps. This improved Splashtop THD quite a bit, there was still some lag but the quality look decent.
Here are some example screenshots I took of Splashtop THD playing at 100Mbps
http://systemwars.com/forums/index....ss-effect-2-on-my-transformer-infinity-tshbr/
This setup is moot since the device is not mobile anymore since I got it on a 100Mb ethernet adapter. This drove my attention to upgrade to Gigabit and true Wireless N speeds.
Luckily in 2012. Gigabit speeds is a common feature of a $70 price ranged router, but I wanted something more than the typical N300 routers so I got the big daddy N900 so I could do 450Mbps wireless which over 4x the amount I was getting over ethernet.
But sadly my goal is stopped in it's tracks due to the Transformer Infinity having the hardware of a pinto.
How on Earth could anyone think 65Mbps max for Wifi in 2012, on a tablet of all devices is enough.
Hell this puts the Transformer Infinity out of the realm of being a decent streaming media device, when it can't even hang with modern media device's mobile speeds.
Click to expand...
Click to collapse
Just to set your expectations properly however , I believe it is quite common if not universal across tabs to limit wifi to 65 or 72 mbps. I'm not sure if there are any mainstream tabs that support more.
You need a dual-band router and a dual-band capable device. Right now your tf700t is a single-band device. So you cannot get higher than 65mbps.
i don't think it is single band/dual band issue
to get the full 450Mb speed on an N device you have to have 3 antenna's 150Mb each at 40mhz
40Mhz is fully supported on the 5Ghz band but not really at the 2.4ghz (but it is working on this crowded band but it will take then 1-9 channels so if there are a lot of access point around then it won't work anyway very good)
so the tablet has a single antenna in the 2.4ghz range only doing 20mhz then it will not go over 72Mb thats just the max
Verstuurd van mijn ASUS Transformer Pad TF700T met Tapatalk
First, reported WIFI Connection speeds are so fake it's hardly worth talking about. I have had devices connect at 54mbps that were far faster at transfer than other devices that connect at 300mbps.
Second 5ghz band is actually terrible for true mobile devices, it has bad range and bad wall penetration which is exacerbated by devices moving around a lot. I have 5ghz on my phone and it's unusable, connecting using 2.4ghz is so much faster and more stable. The new Ipad has 5ghz support but the forums are full of people talking about how unusable it is.
Now all that said I have to agree with the OP that the throughput on the TF is rather disappointing. It's borderline in it's ability to stream full spec hd video. My original TF101 actually has slightly better throughput than my 700 even though it also only connects at <65mbps.
I did apply some of the tweaks from the dev thread with minimal success in improving streaming.
If we had full 450Mbps capacity, everyone would be whining about the "ridiculously low battery life."
Or have people conveniently forgotten that more speed requires more power?
ShadowLea said:
If we had full 450Mbps capacity, everyone would be whining about the "ridiculously low battery life."
Or have people conveniently forgotten that more speed requires more power?
Click to expand...
Click to collapse
I'd happily settle for 270Mbps which my old laptop could do.
Has anyone attached a wifi adapter to their Transformer dock's USB? I wonder will that work alternatively, the same way the D-Link USB Ethernet adapters work from the USB.
Midnitte said:
Wouldn't this be a result of lacking the 5ghz band as well as only having 1 antenna?
Sent from my ASUS Transformer Pad TF700T
Click to expand...
Click to collapse
It has 2 antenna's
Sent from my Galaxy Nexus using xda app-developers app
This doesn't make sense, there's no way Splashtop requires more than those 65Mbps.
Splashtop probably uses some low-profile H.264 encoder, and Tegra 3's own H.264 video decoder only supports that codec up to 40Mbps at 1080p. The tablet's own hardware video decoder would be stuttering well before reaching those 65Mbps.
The BluRay discs have a maximum combined Audio+Video bandwidth (highest-quality 1080p video + 7.1 lossless sound) of 48Mbps. Splashtop is probably just using stereo MP3 @ <320Kbps or even AAC @ <192Kbps for audio, which leaves with more than 60Mbps for the 1080p video alone, which is way more than what nVidia's hardware codec can widthstand.
What you seem to have is a problem with output latencies, which could be due to:
- Slow CPU in the PC that is being used for coding the video+audio stream on-the-fly
- Poor performing parts somewhere in your LAN/WAN (slow router for example)
In case it might be the PC's CPU, try lowering the resolution in the game. It's not like you need it to be playing at 1920*1080. I'm pretty sure you'll still get gorgeous graphics in a 10" screen if you play at 1280*720 with 4X super-sampling antialiasing, for example. Or maybe 1600*900, or 1360*768.
ToTTenTranz said:
This doesn't make sense, there's no way Splashtop requires more than those 65Mbps.
Splashtop probably uses some low-profile H.264 encoder, and Tegra 3's own H.264 video decoder only supports that codec up to 40Mbps at 1080p. The tablet's own hardware video decoder would be stuttering well before reaching those 65Mbps.
The BluRay discs have a maximum combined Audio+Video bandwidth (highest-quality 1080p video + 7.1 lossless sound) of 48Mbps. Splashtop is probably just using stereo MP3 @ <320Kbps or even AAC @ <192Kbps for audio, which leaves with more than 60Mbps for the 1080p video alone, which is way more than what nVidia's hardware codec can widthstand.
What you seem to have is a problem with output latencies, which could be due to:
- Slow CPU in the PC that is being used for coding the video+audio stream on-the-fly
- Poor performing parts somewhere in your LAN/WAN (slow router for example)
In case it might be the PC's CPU, try lowering the resolution in the game. It's not like you need it to be playing at 1920*1080. I'm pretty sure you'll still get gorgeous graphics in a 10" screen if you play at 1280*720 with 4X super-sampling antialiasing, for example. Or maybe 1600*900, or 1360*768.
Click to expand...
Click to collapse
You're confusing "Reported Connection Speed" with actual throughput. No wifi connection reported at 65mbps get's anywhere near 65mbps sustained throughput. The TF at 65 may get 20mbps on a really good day. My laptop connected at 150 might get 35-40.
That said I use run my desktop at full 1080 and have never had streaming issues with splashtop using it on either of my TFs.
ToTTenTranz, I haven't ruled out that poor performing PC could be contributing to latencies.
I am running the PC game near max settings, mainly since I'm trying to demonstrate Splashtop THD to it's full advertised potential and so far I have tested and confirmed that the quality is improved when using a D-Link 100Mbit USB Ethernet adapter over the wireless connection. I would like to see how much further Splashtop THD could perform if had at least double the bandwidth, but now it seems the only way I'll be able to test this is if I get a 1,000Mbit USB Ethernet adapter.

[Q] Nexus 5 can only support 150mbps in 802.11n?

My router can support max 450 mbps in 802.11n. However, Nexus 5 only connect as 150 mbps. Is that because it only has one antenna in its Wi-Fi chip?
Thanks
zjnow said:
My router can support max 450 mbps in 802.11n. However, Nexus 5 only connect as 150 mbps. Is that because it only has one antenna in its Wi-Fi chip?
Thanks
Click to expand...
Click to collapse
Yep, N is basically limited to 150mbps per antenna.
As mentioned it's a 1x1 radio so the max it will do is 150Mbps link rate. Not that you'll ever get those speeds but yeah, that's as fast as it can connect.

maximum wireless N (and AC) speed?

I'm now uploading my nandroid backups (about 3GB each) to Google Drive and it's painfully slow at my current speeds. I currently have a wireless G capable router/modem (Actiontec FIOS router) so it's only capable of uploading at a max of 18mbps (~2.2MB/sec). Turns out it's a few generations behind and now there's N and AC speeds available. Looking at the Nexus 5 specs, it supports N and AC. What kind of speeds are people getting?
Hi i only own a LG G2 but should be the same with WLAN speeds.
On N i get 150mbits
And on AC i get 433mbits
think these are the realistic maximums even when the router spec sheet says up 1300mbits

What's the max. bandwidth of the hotspot?

The wifi module in the S7 fulfills the "ac" standard/version/whatever, so the maximum would be 433 MBit/s, unless I'm mistaken.
I've just bought a wifi dongle for my PC that connects with 72 MBit/s, even when the phone is lying right next to it. And the video stream I'm trying to use keeps stuttering.
Now I'm of course wondering whether this is all the S7 can do or whether the dongle is crap...
Hence my question about what the S7 should be capable of when used as a hotspot.

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