Develop Bugs

"N" -vs- "G" wifi on Vibrant/Galaxy

I noticed when I was at a friend's place recently that the Vibrant supports N wifi networks as well as G. However, I did not have the opportunity to do any extended testing.
I have noticed that wifi transfers over the network using various file sharing tools tend to be slow, and buffering with Allshare can be slow at times. What I'm wondering is, has anybody compared actual speed of Wifi on the Vibrant or Galaxy when using an N network versus G? Is the speed of the phone itself more the limiting factor, or would I get much better speeds using an N network?
Reason is, I'm currently using a Buffalo WHR-54GS router. It is a bit old, but using DD-WRT firmware, it has been rock solid. It does not, however, support N networking. I'm wondering if I would see any improvement in speeds transferring files and buffering DLNA connections by upgrading to a Buffalo WHR-HP-GN which supports N networking.
The only reason I'd upgrade would be for the N based Wifi - so if there's no benefit on my phone, then I wouldn't need to upgrade. Any input?

I have not had a chance to do any benchmarking but I have done allshare over both a G and N network and it did seem noticibly faster over the N network. Especially when paired with a gigabit hard wire to whaterver your streaming to/from.
Actually I think the gigabit helped as much as the wireless N, of course those routers tend to be more expensive...

I got a linksys wrt160n with ddwrt. the n doesnt work great with ddwrt but the router is great. i also have another n wireless but i dont notice much diference at all. maybe internal network stuff but not internet stuff.

Can't say I've done side-by-side comparisons, but it does seem to get some boost from the N speeds. For a new router, I'd suggest the ASUS RT-N16. Just about the most powerful consumer router out there (RAM & CPU) and it runs Tomato (plus dd-wrt)

N is better for streaming.
The N network allows a faster streaming and file transfer over the wifi. Now this will not improve your internet speed. The limit on the router might be higher, the modem will still have its limits. If you use allshare alot, I'll recommend you get a N router, otherwise no reason to purchase something you won't use. I have a Netgear dualband router (WNDR 3300). It supports both N and G networks but I rarely use the N since most of my devices do not support N. The ones I have that do like the Vibrant supports at 2.4ghz frequency. The router can be switched to broadcast the N at 2.4ghz, but like I said, If you're not streaming, there's really no need for it. To put this in numbers, the G networks can only transfer data at the maximum of 50mbps while the N can transfer files at Maximum of ~400mbps (if not higher). If your internet service does not offer more than 50mbps speed, then your internet will remain the same whether on G or N. You have been schooled

Helpful, informative post. Up until the last sentence.

Unless you only set your router to n you wont get the full advantage of using n you will only get compatibility. Having g on slows down you n network to a like speed. At least that what happens on my router, I have a dlink, when I did a little Googling it confirmed it.
Sent from my SGH-T959 using XDA App

Only Loki said:
Unless you only set your router to n you wont get the full advantage of using n you will only get compatibility. Having g on slows down you n network to a like speed. At least that what happens on my router, I have a dlink, when I did a little Googling it confirmed it.
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
May be specific to your Dlink. My Asus does G & N, and the N devices ran significantly faster than the G laptop that I still had connected until recently. The G laptop never slowed anything else down.

tide1988 said:
You have been schooled
Click to expand...
Click to collapse
tide1988 said:
To put this in numbers, the G networks can only transfer data at the maximum of 50mbps while the N can transfer files at Maximum of ~400mbps (if not higher).
Click to expand...
Click to collapse
If you are going to try to school people, please do it right and quit misleading people.
The Vibrant is not MIMO capable, so we only get a theoretical 150Mbps on 802.11N. Due to security and WiFi error correction, realistic throughput is ~70Mb/s. That is 8.75MB/s, slightly faster than an AData 16G class 6 card, but significantly slower than a SanDisk 8G Class 6 card.
On 802.11G, again due to WiFi error correction and security, a realistic throughput number is around 20Mb/s. That is 2.5MB/s, barely faster than a crappy Class 2 SD card.
Keep in mind that these are all "optimal" numbers. The amount of time that your vibrant will ever see these (more realistic) maximum numbers are probably less than 10% of the time.

Saiboogu said:
May be specific to your Dlink. My Asus does G & N, and the N devices ran significantly faster than the G laptop that I still had connected until recently. The G laptop never slowed anything else down.
Click to expand...
Click to collapse
Try a file transfer on N with the compatibility mode off (N Only) versus in B/G/N mode. You should see a speed increase on N only. However, with everything RF, you might have interfering neighbors that will influence testing.

Some of the wireless routers will slow down. it has to do with the router only having one band. In a dual simultaneous router, one band can be slowed to G speeds, such as my PS3 or my dad's 2nd gen iPod touch. My vibrant, however is automatically positioned on a completely seperate stream from the G devices.

i have a Cisco E3000
and i do see a small difference
about a minute difference in downloading a 600mb file

[Q] Is Wi-Fi capped at 10mbps?

I purchased my phone shortly after launch, so I've had it for a while. Every now and then, I'll randomly perform a speed test through the Speedtest.net app. I've noticed that I've never gotten more than 10mbps down when connected via Wi-Fi, even though I have a 50mbps connection -- on LTE, I've gotten up to 20mbps. I've also tested the phone on other Wi-Fi networks, with the same result.
People often say that the online speed tests aren't 100% accurate, so I decided to test the phone using iperf. I used a Linux machine with a direct ethernet connection to the router as the iperf server. I ran several tests, and they all came back with ~10mbps.
Is this normal, or do I have a defective phone that needs to be taken back to AT&T? What's the warranty on these phones, btw? I bought it off-contract at an AT&T retail store.

No, I can get my full internet connection speed through my phone (15mbps). I'd suggest running the test when you the phone is physically closer to the wireless router.
Do you have a 'g' or 'n' wireless connection?

drumist said:
No, I can get my full internet connection speed through my phone (15mbps). I'd suggest running the test when you the phone is physically closer to the wireless router.
Do you have a 'g' or 'n' wireless connection?
Click to expand...
Click to collapse
I've tested on both G and N, as well as 2.4GHz and 5GHz. I've done all my tests within arms reach of the router.

Donatron said:
I've tested on both G and N, as well as 2.4GHz and 5GHz. I've done all my tests within arms reach of the router.
Click to expand...
Click to collapse
Got me stumped then.

The phone connects at G not N, it doesn't have 5GHz capabilities.
The best on N connection (300mbps) PC to PC on my home network, is about sustain 12MB/sec (megabytes/sec), that's about 96mbps which is actually pretty good for N 300mbps.
The phone best can do is 1MB/sec, which is about what I was getting on G network card PC to PC, therefor it seems this phone doesn't actually have N connection
These statistics are pure amateur stats using NetMeter on PC and Traffic Monitor on phone.
My router doesn't show actual connection speed of a device

[email protected] said:
The phone connects at G not N, it doesn't have 5GHz capabilities.
The best on N connection (300mbps) PC to PC on my home network, is about sustain 12MB/sec (megabytes/sec), that's about 96mbps which is actually pretty good for N 300mbps.
The phone best can do is 1MB/sec, which is about what I was getting on G network card PC to PC, therefor it seems this phone doesn't actually have N connection
These statistics are pure amateur stats using NetMeter on PC and Traffic Monitor on phone.
My router doesn't show actual connection speed of a device
Click to expand...
Click to collapse
You could see connection speed in wifi settings by tapping on connected network.

[email protected] said:
The phone connects at G not N, it doesn't have 5GHz capabilities.
The best on N connection (300mbps) PC to PC on my home network, is about sustain 12MB/sec (megabytes/sec), that's about 96mbps which is actually pretty good for N 300mbps.
The phone best can do is 1MB/sec, which is about what I was getting on G network card PC to PC, therefor it seems this phone doesn't actually have N connection
These statistics are pure amateur stats using NetMeter on PC and Traffic Monitor on phone.
My router doesn't show actual connection speed of a device
Click to expand...
Click to collapse
You're right, it doesn't have 5GHz capabilities. My mistake. I did my iperf tests on two different routers, an ASUS RT-N66U (stock) and Linksys WRT54GL (w/ DD-WRT). I forgot that my phone only connects to the 2.4GHz band of the ASUS router.
Anyways, do believe that it does have N capabilities. It's listed in the specs. It's just that we don't get anything close to N speeds.

FlintPNZ said:
You could see connection speed in wifi settings by tapping on connected network.
Click to expand...
Click to collapse
65Mbps = G network...Nice lie, LG!

Donatron said:
You're right, it doesn't have 5GHz capabilities. My mistake. I did my iperf tests on two different routers, an ASUS RT-N66U (stock) and Linksys WRT54GL (w/ DD-WRT). I forgot that my phone only connects to the 2.4GHz band of the ASUS router.
Anyways, do believe that it does have N capabilities. It's listed in the specs. It's just that we don't get anything close to N speeds.
Click to expand...
Click to collapse
It doesn't seem to be related to that though. I only have G wifi at home, and I can get 1.5MB/sec (12mbps) which is my maximum internet speed without any issue.
Have you tried running a speed test on a different wifi network?
---------- Post added at 06:57 PM ---------- Previous post was at 06:41 PM ----------
[email protected] said:
65Mbps = G network...Nice lie, LG!
Click to expand...
Click to collapse
Not necessarily. Some routers can do better than 54mbps on wireless-G if the device supports it. See here: http://en.wikipedia.org/wiki/125_High_Speed_Mode
Dunno if that's actually what's happening though.

WiFi speedtest on 30mbps internet

SPH-L710 (Sprint Official Stock Firmware Android 4.1.1) Rooted
I have 30mbps down and 2mbps internet package
im getting between 16mbps and 20mbps down and 2mbps to 3mbps up.
my laptop with built-in wireless card gets pretty much the same but when i use my usb wifi adapter (linksys in 2.4ghz mode) it gets 30mbps down and close to the same upload.
my router is a belkin n300 share with stock belkin firmware
so i know the router can do 30mbps over wifi as my linksys usb wifi adapter proves that.
just wondering why my laptop AND GS3 only get about 20mbps consistantly over wifi....
anyone do a test on their S3 over "WIFI" and see what they get or tell me what is wrong with my laptop and s3?
the router can not do 5ghz it is only capeable of 2.4ghz and b/g/n with 20mhz/40mhz bandwith
when i use that linksys usb wifi adapter its really working good but im surprised the GS3 is not, the laptop i could even understand getting the 20mbps (wireless-n 1030 built-in)
it dont seem like any setting i make really changes the speed for the laptop or the phone
suggestions would be great

question
en11gma said:
SPH-L710 (Sprint Official Stock Firmware Android 4.1.1) Rooted
I have 30mbps down and 2mbps internet package
im getting between 16mbps and 20mbps down and 2mbps to 3mbps up.
my laptop with built-in wireless card gets pretty much the same but when i use my usb wifi adapter (linksys in 2.4ghz mode) it gets 30mbps down and close to the same upload.
my router is a belkin n300 share with stock belkin firmware
so i know the router can do 30mbps over wifi as my linksys usb wifi adapter proves that.
just wondering why my laptop AND GS3 only get about 20mbps consistantly over wifi....
anyone do a test on their S3 over "WIFI" and see what they get or tell me what is wrong with my laptop and s3?
the router can not do 5ghz it is only capeable of 2.4ghz and b/g/n with 20mhz/40mhz bandwith
when i use that linksys usb wifi adapter its really working good but im surprised the GS3 is not, the laptop i could even understand getting the 20mbps (wireless-n 1030 built-in)
it dont seem like any setting i make really changes the speed for the laptop or the phone
suggestions would be great
Click to expand...
Click to collapse
Have you used multiple speed test sites to get these scores? Some are inaccurate.

dhunt4949 said:
Have you used multiple speed test sites to get these scores? Some are inaccurate.
Click to expand...
Click to collapse
yep
i pick the servers with speedtest app
im picking the same exact server i get 30mpbs with my linksys usb adapter
just wanted to note:
when using iPerf (only checking b/w over the lan) i get about 10mbps from s3 to laptop wireless n 1030 buitlin
when hooking laptop straight to router with lan cord and run iperf i get the same 20mbps on the s3
there is something wrong with the wifi in the S3 i believe

could be
en11gma said:
yep
i pick the servers with speedtest app
im picking the same exact server i get 30mpbs with my linksys usb adapter
just wanted to note:
when using iPerf (only checking b/w over the lan) i get about 10mbps from s3 to laptop wireless n 1030 buitlin
when hooking laptop straight to router with lan cord and run iperf i get the same 20mbps on the s3
there is something wrong with the wifi in the S3 i believe
Click to expand...
Click to collapse
In that case, Have you tried another rom or a full wipe?

dhunt4949 said:
In that case, Have you tried another rom or a full wipe?
Click to expand...
Click to collapse
how about someone here verify this is a problem i found
tell me what you get. im sure you are gonna check if you have a fast connection to the internet over wifi

ask someone to do a speed test over wifi and no one wants to take the time to do it?
takes a few mins

Nope my laptop and gs3 get the same speeds. In also have 30mbps down and 5 upload
http://i1202.photobucket.com/albums/bb374/TexasEpic/ThePeoplesROM-KennyGlass123/daniel4653.png

en11gma said:
SPH-L710 (Sprint Official Stock Firmware Android 4.1.1) Rooted
I have 30mbps down and 2mbps internet package
im getting between 16mbps and 20mbps down and 2mbps to 3mbps up.
my laptop with built-in wireless card gets pretty much the same but when i use my usb wifi adapter (linksys in 2.4ghz mode) it gets 30mbps down and close to the same upload.
my router is a belkin n300 share with stock belkin firmware
so i know the router can do 30mbps over wifi as my linksys usb wifi adapter proves that.
just wondering why my laptop AND GS3 only get about 20mbps consistantly over wifi....
anyone do a test on their S3 over "WIFI" and see what they get or tell me what is wrong with my laptop and s3?
the router can not do 5ghz it is only capeable of 2.4ghz and b/g/n with 20mhz/40mhz bandwith
when i use that linksys usb wifi adapter its really working good but im surprised the GS3 is not, the laptop i could even understand getting the 20mbps (wireless-n 1030 built-in)
it dont seem like any setting i make really changes the speed for the laptop or the phone
suggestions would be great
Click to expand...
Click to collapse
The USB WiFi adapter are far more advanced an faster than that of a phone or laptop its not a modem issue or device issue its just simply the WiFi adapters inside our devices i have a similar issue where i have a 35mbs plan and i only got around 15-20mbs i upgraded my router and now i nearly achieve my 35mbs mark but no matter what router you get if you use Ethernet or a USB WiFi card the internet will be faster because generally computers interpret internet faster over a hard connection vs a wireless connection where u still loose around 5-10mbs the only possible solution is maybe invest in a different router with the option to direct more bandwidth via WiFi or change your WiFi broadcast frequency to only one type or frequency weather it be 801.11n or 802.11g or 802.11b choose ONE that is fastest not all 3 or which ever you have because that generally slows your internet by great amounts as well
Sent from my SPH-L710 using xda app-developers app

daniel4653 said:
Nope my laptop and gs3 get the same speeds. In also have 30mbps down and 5 upload
http://i1202.photobucket.com/albums/bb374/TexasEpic/ThePeoplesROM-KennyGlass123/daniel4653.png
Click to expand...
Click to collapse
and what were your speeds you got on both your laptop and gs3?
jazz995756 said:
The USB WiFi adapter are far more advanced an faster than that of a phone or laptop its not a modem issue or device issue its just simply the WiFi adapters inside our devices i have a similar issue where i have a 35mbs plan and i only got around 15-20mbs i upgraded my router and now i nearly achieve my 35mbs mark but no matter what router you get if you use Ethernet or a USB WiFi card the internet will be faster because generally computers interpret internet faster over a hard connection vs a wireless connection where u still loose around 5-10mbs the only possible solution is maybe invest in a different router with the option to direct more bandwidth via WiFi or change your WiFi broadcast frequency to only one type or frequency weather it be 801.11n or 802.11g or 802.11b choose ONE that is fastest not all 3 or which ever you have because that generally slows your internet by great amounts as well
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
why exactly do the phone (gs3 in this case) and the laptop (built-in intel wireless-n 1030) get the same speeds?
with wireless-n (even at 2,4) single antenna it should get close to 150mbps (theorectical)
wireless G = 54mbps in actuality it is around 20mbps which is what im getting and yep i checked both the laptop and the gs3 show as wireless n connections
you made an interesting point about putting the router in a single mode like "N" and i have tried that but both the laptop and the phone will not connect unless i put the router in b/g/n mode
the linksys usb adapter will connect ok with the router in wireless "N" mode
i am running latest belkin firmware for my f7d3302 router

Because its a wireless signal most devices interpret signals much better through Ethernet or USB just because it cant capture the signal fast enough and long enough to keep it stable enough to stay at the same speed the router is broadcasting at sure enough the router is broadcasting at a stable speed but the device wont capture it fast enough the only solution i found is what i mentioned to either get a router which makes a more stronger secure signal or broadcast at only one frequency and the s3 should capture N maybe try changing from 2.4 to 5.0 and try N again otherwise there might be a hardware issue because i use my router at 2.4 with 801.11n on channel 10 and my internet is almost as fast as Ethernet and far longer range
Sent from my SPH-L710 using xda app-developers app

en11gma said:
and what were your speeds you got on both your laptop and gs3?
why exactly do the phone (gs3 in this case) and the laptop (built-in intel wireless-n 1030) get the same speeds?
with wireless-n (even at 2,4) single antenna it should get close to 150mbps (theorectical)
wireless G = 54mbps in actuality it is around 20mbps which is what im getting and yep i checked both the laptop and the gs3 show as wireless n connections
you made an interesting point about putting the router in a single mode like "N" and i have tried that but both the laptop and the phone will not connect unless i put the router in b/g/n mode
the linksys usb adapter will connect ok with the router in wireless "N" mode
i am running latest belkin firmware for my f7d3302 router
Click to expand...
Click to collapse
28-32 down and 4-6 upload
http://i1202.photobucket.com/albums/bb374/TexasEpic/ThePeoplesROM-KennyGlass123/daniel4653.png

Or maybe your laptop and phone aren't setup properly to register this type of signal i know i had to call Acer to get my laptop to register a N signal so might want to play around with your wireless settings
Sent from my SPH-L710 using xda app-developers app

was able to put router in wireless n mode only (2.4ghz) by enabling "802.11e/WMM QoS"
now laptop with built-in nic and s3 can both connect at wireless n only
the laptop speed did jump up to what the hard wire ethernet cable AND linksys usb wifi are getting
they are all getting 28mbps (within a 1mbps deviation)
the phone is still stuck at 18-22mbps.
daniel4653
so the phone can actually get over 22mbps in "WIFI" mode?
are you on 5ghz N or 2.4ghz N?
would like to add
iperf from the phone to the laptop (builtin nic) is now getting 25mbps in multiple runs
this is on the local lan only in wireless N mode (2.4ghz) with 20/40 enabled in router
so this is a big improvement over the 7-10mbps i was getting earlier but the wifi connected to net is still 20mbps

en11gma said:
was able to put router in wireless n mode only (2.4ghz) by enabling "802.11e/WMM QoS"
now laptop with built-in nic and s3 can both connect at wireless n only
the laptop speed did jump up to what the hard wire ethernet cable AND linksys usb wifi are getting
they are all getting 28mbps (within a 1mbps deviation)
the phone is still stuck at 18-22mbps.
daniel4653
so the phone can actually get over 22mbps in "WIFI" mode?
are you on 5ghz N or 2.4ghz N?
Click to expand...
Click to collapse
With phones there is a bigger difference because they're might be many factors like the modem the type of WiFi chip the size of the chip range and capability also what ROM your running just too much that might vary but on my phone on average i get around 20mbs it seems to me there's a 10mbs variation because at work we have a 100mbs connection and i get around 85mbs i believe the s3 maxes out at 100 but to reach that you have to have some fast internet and either a gaming router or a business router
Sent from my SPH-L710 using xda app-developers app

on wireless n (2.4ghz) it should connect the "link speed" at 150mbps
when its at 150mbps this indicates "Channel Bonding" is working
im getting 72mbps and i had been reading other cellphone that had similar problems @ 75mbps
to my understanding the phones were not channel bonding correctly.
i have had 3-4 people saying all kinds of stuff without really saying anything scientific.
i could have done that too but instead i knew there was a real problem
i kept digging and am sharing my experience as i find out what is really going on.
to check your "link speed" you can long press on your wifi connection and then go advance and scroll down and it should show it.
you can also get wifi analyzer and change the view and then select your connection
from what it looks like this galaxy s3 and my belkin n300 share router are not getting along.
i need another router to see if that is the problem or if it is really my phone and the software its running.
if other people with their devices would post your findings here it would be great
thanks

I have Verizon fios quantum 150/75 my S3 never sees above 40/50. I have the newest Verizon actiontek rev. I router. My desktop receives 160/79 on LAN
Sent from my SPH-L710 using xda premium

blazerboy567 said:
I have Verizon fios quantum 150/75 my S3 never sees above 40/50. I have the newest Verizon actiontek rev. I router. My desktop receives 160/79 on LAN
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Thats ridiculous
Sent from my PG06100

blazerboy567 said:
I have Verizon fios quantum 150/75 my S3 never sees above 40/50. I have the newest Verizon actiontek rev. I router. My desktop receives 160/79 on LAN
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
holy crap
looks like you are going to be the record holder
i take it that is at 5ghz and link speed is at 150
what is the fastest speeds you can get in wifi with only 2.4ghz?

40/50 is at 5ghz never tried setting the router to board cast 2.4ghz only. Is that the case why I do not see speeds higher then 40/50 on my S3. Never really thought about it
Sent from my SPH-L710 using xda premium

blazerboy567 said:
40/50 is at 5ghz never tried setting the router to board cast 2.4ghz only. Is that the case why I do not see speeds higher then 40/50 on my S3. Never really thought about it
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
if you try to put your router at 2.4ghz (wireless n with 20/40) and connect your phone at "link speed 150mbps" you might still get that same 40/50
if your "link speed = 72mbps" like mine you will probably only get 20mbps down and prob same thing up
im pretty curious as it does seem like your phone and internet is working correctly

Slow Wifi

I am getting low speeds when using wifi on GS3 compared to my computer and brothers nexus 4. In my room which is the room next to the living room with the router I get about 16-20 mbps on 2.4 ghz and about 8-10 on 5ghz. My brother was getting about 40mbps on his nexus and my computer about 46 mbps.
What can I do to fix?

aamir123 said:
I am getting low speeds when using wifi on GS3 compared to my computer and brothers nexus 4. In my room which is the room next to the living room with the router I get about 16-20 mbps on 2.4 ghz and about 8-10 on 5ghz. My brother was getting about 40mbps on his nexus and my computer about 46 mbps.
What can I do to fix?
Click to expand...
Click to collapse
You could try on the ROM to set for one frequency band only instead of Auto. For example, 2.4 and not 5ghz. Also, your Router's admin page could give preference to a particular device with QoS settings.
Maybe reboot the router and cable modem/dsl to see if that might help.
It's a possibility you could try to change the wifi channel you are connecting on as well. It may be set as auto but may get interference. I would only caution, the laptops seems to have higher powered antennas and our phones usually aren't terribly high power so they may have the possibility of being susceptible to more interference whereas the laptop is not.

Get inSSIDer from the play store. It will help you find the best wifi channel.
Sent from my SGH-T999L using xda premium

TomTcom said:
You could try on the ROM to set for one frequency band only instead of Auto. For example, 2.4 and not 5ghz. Also, your Router's admin page could give preference to a particular device with QoS settings.
Maybe reboot the router and cable modem/dsl to see if that might help.
It's a possibility you could try to change the wifi channel you are connecting on as well. It may be set as auto but may get interference. I would only caution, the laptops seems to have higher powered antennas and our phones usually aren't terribly high power so they may have the possibility of being susceptible to more interference whereas the laptop is not.
Click to expand...
Click to collapse
I turned QoS off, speeds on every other device are great except for the phone itself. Like I said my bro standing next to me and my laptop in my room got around 40mbps (nexus 4) and my laptop got around 46-48 mbps while my S3 was only able to pull near 20mbps. I've tried limiting my frequency scans to 2.4ghz or 5ghz only and have not noticed any differences. Actually 5ghz seems to be slower which is weird since my bro and my phone are the only ones able to connect to that band. You guys think changing wifi drivers would make a difference in my phone? I know different kernels have different wifi drivers built in.
DocHoliday77 said:
Get inSSIDer from the play store. It will help you find the best wifi channel.
Sent from my SGH-T999L using xda premium
Click to expand...
Click to collapse
I used wifi analyzer to set the channel.
any other help from anyone would be appreciated.

High latency from local computers

Hi.
I have this Nexus 7 Flo, with PAC-man ROM and ElementalX 1.8 kernel.
I've got a TP-Link TL-WR941N, which is 802.11n. It isn't running at 5GHz and it works fast and flawlessly on every computer out here.
Today I've tried to play with Splashtop GamePad and noticed a pretty high input lag, together with a slow image recovering (as if the game was running at 15fps), but not constantly. Game was running smooth on the pc and it is connected thru cables.
Pinging to my N7 gives me around 80~150ms of latency. Pinging any wireless computer on my network gives 1~5ms, WCS would give me 50ms (weak reception).
Looking at the wireless settings, I've noticed that the N7 reports a speed of 65mbps (which is above the .11g speed, and well below the .11n speed), even if I'm virtually scratching it against the router's antennas. Most of the other wireless machines reported 150mbps
Is it a common issue? People are sleeping around here and I cannot wake em up to ping their mobiles lol
Is it a radio problem or kernel, battery saving related? I'm able to get my internet's full speed through the wifi on N7, but this latency is killing me
Sent from my Nexus 7 using Tapatalk

Bump.
I've tried with different Android devices (Samsungs, S3 and a Tab 7), they all pinged just the same, and had the same 65mbps speed.
I'll try with some Apple devices later.
Sent from my Nexus 7 using Tapatalk

I just checked my Nexus 7. It tells me I have either 54 or 135 Mbps. My Galaxy Nexus has 65 Mbps. The GN pings between 1ms and 200 ms, fairly irregularly on my 2.4GHz network (5GHz doesn't work unfortunately, unless I sit it on top of my router). My Nexus 7 pings between 1ms and 200ms on the 5GHz network, but has more double digits pings than the GN, which has more triple digits. Nexus 7 has stock ROM 4.3.1 with ElementalX 1.8 kernel on a Netgear N750 router.
Pinging my wifes smartphone in another room, I get 150 to 230ms ping over the 2.4GHz network. I think my HTPC pings are usually between 40 and 80ms.
Not sure if any of that helps you.

Death666Angel said:
I just checked my Nexus 7. It tells me I have either 54 or 135 Mbps. My Galaxy Nexus has 65 Mbps. The GN pings between 1ms and 200 ms, fairly irregularly on my 2.4GHz network (5GHz doesn't work unfortunately, unless I sit it on top of my router). My Nexus 7 pings between 1ms and 200ms on the 5GHz network, but has more double digits pings than the GN, which has more triple digits. Nexus 7 has stock ROM 4.3.1 with ElementalX 1.8 kernel on a Netgear N750 router.
Pinging my wifes smartphone in another room, I get 150 to 230ms ping over the 2.4GHz network. I think my HTPC pings are usually between 40 and 80ms.
Not sure if any of that helps you.
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Yeah.. I'm getting pretty much the same :/
I've did some tests with an Motorola Atrix, an iPhone 4S and a iPad 2. They all ping just the same, with an eventual four digit latency. I've tried it in two different routers (from TP-Link) and one Intelbras (.11g). They all behave the same. Funny that on Speedtest app, they ping lower to a remote server than to my local computers.
My Raspberry PI pings between 1 to 5ms, so does every other physical computer and laptops set to answer ping requests.
I don't know why does this happen
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