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Wifi hangs

I have a problem with wifi since I had bought my htc dream..
I connect to my wifi network and all goes well.. I can browse internet, market, and so on.. But after some minutes it begin to hangs.. If a wait for some times it returns to normality, but after some minutes the situation is newly bad..
Wifi work/does not work/work/does not work.... and so on..
Is someone having the same problem?
How could i resolve?

What are your specs?

What do you intend? My router?
It is a michelangelo wave..
It perfectly works with my wii, nds, eeepc, iPod touch.. Only with G1 I have problems

My bad what are your specs on your phone. I'm assuming your rooted, but what rom and radio are you running?

I'm running latest experimental cyanogen + latetst spl (the one used to run hero)
However I always had this problem.. Changing various roms and radios..
rc29 (or uk correspondant) adp1, adp1.1, various jf, hero rom, the dudes, various cyans..
Always had this problem

Does this issue only exist with using your Wifi at home? As in your router? The G1 has some known issues for not connecting or hang time with certain routers. I myself have somewhat the same issue you have. I have a D-Link DI-614+ wireless router (old as hell but hasn't failed yet). Weird thing is only my phone will not connect to the router unless i do a soft reset via internal, EVERYTIME i connect my phone to it.
My guess is that your router may be the problem here, not that there's anything wrong with it. Try going to an area with a wifi hotspot or try borrowing a friends router to see if your phone acts any different. Starbucks, library, etc.
Otherwise, try messing around with some of the settings of your router. Because I've never heard of your router so I wouldn't know what to recommend for it.

Yes, the problem is only with my router.. I asked to know if someone managed to solve it..

Can you post the specs on your router please.
Brand name, Model number...

Michelangelo Wave.. This is is name..
ROUTER ADSL
- Router ADSL 2/2+ with integrated Wireless
- Maximum speed (downstream): 24 Mbit/s (full rate)
- Maximum speed( upstream): 1 Mbit/s
- Interface ADSL: ANSI T1.413 Issue 2, ITU-T G.992.5 (ADSL2+), ITU-T G.992.3 (ADSL2), DELT, READSL2, ITU-T g.992.1 (G.dmt), ITU-T G.992.2 (G.Lite), ITU-T G.494.1 (G.hs)
- Supported protocols: RFC-2364 (PPPoA), RFC-2516 (PPPoE), RFC-1483 (Bridged e Routed), ENET ENCAP
- SOHO Firewall support, NAT e NAT Full Features, Radius Authentication, Virtual Server, DMZ, MAC filtering, Dynamic DNS, UPnP, RIP
- DHCP Server/Client/Relay
- VPN Passthrough (L2TP/PPTP/IPSec)
- Switch 4 ports 10/100 Mbit/s Autosensing
- Store & Forward technology
- Automatic MDI-X/MDI
- 1 WAN ADSL RJ11
WIRELESS ACCESS POINT
- Access Point Wireless 54 Mbit/s
- Standard Wireless IEEE 802.11h/b 54Mbit/s 2.4GHz
- Operable with devices Wireless IEEE 802.11b a 11 Mbit/s
- DSSS Direct Sequence Spread Spectrum, 13 canals
- Wireless speed: Automatic, da 54 a 1 Mbit/s
- WEP, WPA e WPA2
- Operable Wi-Fi

Have you checked to see if there is an update for your firmware for the router. Also I see its 802.11b/h. I was reading that some people were having problems with wireless "n" and had to revert back to "g" for the g1 to operate properly. Have you tried changing any of the settings in your router to see if that would effect it at all.

I tried, but I actually don't know exactly what change..

blackgin said:
I tried, but I actually don't know exactly what change..
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You tried changing your settings on your router or firmware. Just tryna make sure I'm on the same page. I don't know if I over looked it in the post with all the specs on your router, but what is your routers model number.

What do you intend with model number?

It will help with troubleshooting.

Sorry but I think it has not a model number. Like for example HTC P3450..
It is just "Digicom Michelangelo Wave"

Does the HD7 really do 802.11n?

Until recently I was using Connectify to set up a home wifi hotspot for my phone (TMOUS HD7, running 7720 with the latest T-Mobile/HTC firmware) to use. Yesterday I installed a router instead, which has allowed me to play with more network settings.
If I set the router to 802.11n-only, my HD7 can see it but can't connect. If I set it to 802.11g-only, everything works fine. Has anyone actually confirmed that the HD7 can do "n"?

my home wifi network is "n" and both my hd7's connect to it fine.

I have forced the n-mode, no problems connecting

Yep, Wireless N works perfectly fine here

Which 802.11n are you talking about? 2.4Ghz works but 5Ghz won't. so it only does draft n not full 300mbps 5ghz 802.11n

You are comparing two different things, WLAN standard has nothing to do with frequency, HD7 follows IEEE802.11b/g/n standard operating on 2.4 GHz with 20/40MHz bandwidth, allowing maximum throughput of 150Mbps. It is capable of DSSS and OFDM modulation, and is also capable of operating in dualband mode, which allows it to connect to 2.4 GHz and 5GHz IEEE802.11a/b/g/n networks, this is however up to the OEM to enable this feature, this is not the case for HD7, or any WP7 device out there.

Snake. said:
You are comparing two different things, WLAN standard has nothing to do with frequency, HD7 follows IEEE802.11b/g/n standard operating on 2.4 GHz with 20/40MHz bandwidth, allowing maximum throughput of 150Mbps. It is capable of DSSS and OFDM modulation, and is also capable of operating in dualband mode, which allows it to connect to 2.4 GHz and 5GHz IEEE802.11a/b/g/n networks, this is however up to the OEM to enable this feature, this is not the case for HD7, or any WP7 device out there.
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Draft-n was 2.4ghz 150mbps was it not? where as full rate 802.11n is 300mbps and operates at 5ghz?!

Well, yes and no, 802.11n is capable of data rates up to 600 Mbit/s, those are achieved only with the maximum of four spatial streams using a 40 MHz-wide channel. However, when in 2.4 GHz enabling this option takes up to 82% of the unlicensed band, which in many areas may prove to be unfeasible. I don´t have device which is able to be set to achieve this limit (2.4GHz / 40MHz with 400ns Guard Interval), so I can´t test it. Do you have internet connection that requires such a high value?

Snake. said:
Well, yes and no, 802.11n is capable of data rates up to 600 Mbit/s, those are achieved only with the maximum of four spatial streams using a 40 MHz-wide channel. However, when in 2.4 GHz enabling this option takes up to 82% of the unlicensed band, which in many areas may prove to be unfeasible. I don´t have device which is able to be set to achieve this limit (2.4GHz / 40MHz with 400ns Guard Interval), so I can´t test it. Do you have internet connection that requires such a high value?
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lol personally now i don't my links is 17mbit but i like the 300mbps for video streaming and file transfers, if only i had an access point with a gigabit lan interface haha

ChromeCast with RT-AC66U running Merlin Firmware

In order to get my Chromecast working with the latest Merlin flash I had to Enable the following on the "LAN / IPTV" page of Merlin firmware:
"Enable efficient multicast forwarding (IGMP Snooping)"
(If you're not familiar with Merlin version of the firmware for this router - it is essentially like the Asus firmware with some goodies / upgrades tacked on and fixes applied.)
I DID NOT enable IGMP Snooping settings in the 2.4ghz "Wireless / Professional" tab if anyone was wondering about that setting. I have limited knowledge of what these settings actually do and was just troubleshooting via trial and error.
I did a REBOOT through the router interface after setting the enabled setting in LAN / IPTV mentioned above.
Just to let you guys know as I didn't see anyone completely address it here and I was really struggling with getting my Chromecast set up on a new flash until I found this particular setting change.
I am running a pair of RT-AC66U's. (I keep one off-line that I play around with flashing Merlin and/or DD-WRT firmware and put on-line for testing purposes if something goes wrong with a flash or setting).
My version of Merlin is the latest Beta I could download at:
https://www.mediafire.com/folder/bkfq2a6aebq68//Asuswrt-Merlin#lt9d2blv8a9uh
I am using "Firmware:3.0.0.4.374.36_beta1 (Merlin build)" according to my configuration page. This is the latest Beta dated 12-23-2013.
I'd be interested in finding out if anyone is using anything different with success on Chromecast with this router configuration or if this is the only configuration that works. Haven't done any network testings of any substance yet but everything seems to be running smoothly.
Pings to my internal LAN server seem to be tight anywhere from about 1-5msec.

I run rt-n66u's and haven't had any issues but I am also not running the latest merlin.
Thanks for the post so after I upgrade if I am having issues I know what to try first.
Sent from my Nexus 5 using Tapatalk

I'm running the latest Merlin and have no issues with my cc. I haven't tweaked many if any of the router settings.

ChromeCast and Merlin firmware
Warjcowski said:
I'm running the latest Merlin and have no issues with my cc. I haven't tweaked many if any of the router settings.
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My setup was working for a while - but after about a week or so, the setup above seemed to totally dog out my Internet connection and it was definitely something in the router as I was getting 30+ mbps download and 10-20 mbps upload which is consistent with what my ISP says they are providing to me. (Tested by hooking up my Ubuntu laptop directly to the cable modem.)
I literally couldn't run Chromecast with Netflix. Not sure why the router got so bogged down after a few weeks. So I hooked up the standard Asus firmware - this worked fine for providing Internet access at fully subscribed speeds - but now the Chromecast won't work with the most recent firmware that Asus has for the RT-AC66U. Tried IGMP snooping and it doesn't seem to matter.
I see there is a third Beta revision of the Merlin firmware - presently. I'm going to try that version on my backup version of this router and see if that presents any problem or not with the Chromecast.
Wish there was a good troubleshooting guide for CC and this router. So many settings and very little information as to what works and what doesn't when using CC with the RT-AC66U router.

Haven't had my chromecast working for months with this router now. Kind of given up. Actually not sure how I even got it set up the first time.
Must have been sheer blind luck.
A lot easier just to hook up the laptop with display port or HDMI connection and stream to the TV.

Somewhat related but I have the N66U with Tomato FW and cc not connecting for some reason. Was fine on Merlin FW

I have a RT-N66U running Merlin 374.41 build. My Chromecast was working fine until a recent Chromecast update to the 16664 firmware. Unfortunately, I did upgrade the router sometime in the same timeframe, so I don't know which is the ultimate problem. Also, I checked my "efficient multicast forwarding" setting mentioned in the OP, and it was not enabled. I will try that and see if that changes anything.
To be clear, the Chromecast seems to connect to the wireless network, but it looks like the protocol traffic is getting lost since none of the other Chromecast enabled devices on the network can see the Chromecast. To fix it, I've been having to do a factory reset on the Chromecast and go through the setup procedure every time I want to use the Chromecast.

IGMP Snooping allows/tells the router to analyze the IGMP group information of packets and handle them based on that.
This allows for more-intelligent multicast packet forwarding to specific ports rather than flooding all ports.
It's very much akin to how a network switch remembers which addresses are connected to each port and sends packets destined for that address only to that port whereas a network hub will send every incoming packet to all ports, quickly flooding available bandwidth.
Quick example case - say you have two pairs of devices communicating, A->B and C->D, all on 100 Mbps (Fast Ethernet) connection.
On a switch (assuming full switching fabric), A's traffic to B will only go to the port B is on. The same is true for C's traffic to D.
Thus, A->B traffic will have full 100 Mbps bandwidth and C->D traffic will have full 100 Mbps bandwidth (minus overhead, of course).
On a hub, A's traffic to B will still "clog the pipe" on all ports, the same with C's traffic to D.
Thus, instead of A->B having a full 100 Mbps and C->D having a full 100 Mbps, the combined traffic shares 100 Mbps.
If things are equally balanced, A->B gets 50 Mbps and C->D gets 50 Mbps, but in reality this is rarely the case.
You can also think of this like having a dynamically-created VLAN memberships for multicast traffic.
However, the potential downsides are decreased throughput and increased latency for other traffic since some processing time is required to snoop the packets. Also, if the multicast client does not properly register, or router/switch has a bug, the client might get entirely ignored and "miss" the multicast packets entirely. That's why one of the troubleshooting steps is to toggle IGMP Snooping (it's usually disabled by default, but sometimes not) to see if there is an inadvertent shunning going on.

Ok, it looks like I needed to turn TKIP back on for the 2.4GHz network. Once I switched to AES+TKIP, the Chomecast shows up again on my mobile devices.

troycarpenter said:
Ok, it looks like I needed to turn TKIP back on for the 2.4GHz network. Once I switched to AES+TKIP, the Chomecast shows up again on my mobile devices.
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Interesting situation. I run AES-only but I've seen router "quirks" like this in the past.
On some old routers I had "creeping" configuration issues where after repeated configuration changes the router would eventually lose its mind and I had to reset the configuration and apply settings by hand again. Sometimes in the "lost its mind" configuration it would do very strange things.
Now would be a good time to back up your router configuration, just in case you have an issue like I had in the past.

I have a chromecast running with rt-ac66u router with dd-wrt. if I forget which atm but the chromecast had issue with either tkip or aes. I changed it to the other and it now works flawlessly.

G900-F real life WiFi 802.11ac performance benchmarks

Hi all
I couldn’t find detail benchmarks of S5 implementation of Broadcom BCM4354 2x2 MIMO 5G WiFi 802.11ac module and in the end decided to take u plunge and purchased Asus ac68u router. Went thru setting up 5G ac wireless network and current results look like this:
S5 connects to 5G ac network with link speed of 866Mbps
File copy from:
Gigabit LAN wired PC to Routers attached USB 2.0 HDD 29MBps (240Mbps) - bottleneck usb 2.0 interface
5G ac WiFI S5 internal storage to Routers attached USB 2.0 HDD 11 MBps (90Mbps)
5G ac WiFI S5 sandisk 128GB microSD card to Routers attached USB 2.0 HDD 11 MBps (90 Mbps)
I have 100/100Mbps broadband internet connection and S5 on speed test performs as follows:
72Mbps DL / 75Mbps UL (same connection via wired PC benchmarks at 94Mbps DL / 95Mbps UL)
I haven’t managed to achieve transfers speeds above 100Mbps from or to S5 in any combination. Can you please share your experience of S5 wifi ac 5G network performance
Related : thread by xenokc about S5 performance on 802.11ac network
Thanks
Kreso

can you test with no encryption? wep/wpa completely off.

Isriam said:
can you test with no encryption? wep/wpa completely off.
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Yes, i have tried that, but there was no change. Router firmware is upgraded to the latest version / wireless test were done in close proximity (1 meter) to the router without any physical obstacles between (clear line of sight)
I'm really on a mission to achieve transfers speed in a range of 350Mbps-400Mbs on local LAN (which should be doable) but i cannot get pas 100Mbps!!

i'll try to test as i know AC should be able to do it.

..

fffft said:
802.11 ac provides a theoretical maximum stream speed of 433 Mbps or 900 MB/s across eight streams. That is under ideal conditions - maximum signal strength, zero interference, zero processing overhead and zero packet overhead. Many router 802.11ac chipsets only support four streams and due to real life channel contention, you aren't likely to see more than two or three 160 Mhz channels chopping that maximum speed to about 250 MB/s. All of those speeds assume channel bonding and quite a few routers can't bond 80 Mhz channels cutting that speed in half again (125 MB/s). Then you have real world losses due to signal attenuation, antenna inefficiencies and interference.
The S5 was the first smartphone to support two MIMO streams. But two is not three, so lop another third off our speed figure (or lop two thirds off for the iPhone 6 which only supports one stream). You simply won't achieve your goal with the S5 or any other current smartphone. 350 Mbps is the upper end of the maximum speed you might expect to see from a high end MIMO PC card under ideal conditions in the same room.
In real life and through a wall, you should expect considerably slower transfers. And the type of traffic matters too e.g. TCP traffic overhead often reduces speeds three fold over UDP streams in router speed tests.
.
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Thanks for detailed feedback, but then there is no benefit from implementing ac standard or 2 spatial streams suporrted by broadcom chipset when performance is comperable to WiFi n standard? But then again how did those guys here managed to pull of such results:
382MbpsDL
or
436Mbps
whit same hardware setup?

..

what kind of latency differences did you see between the wifi phone and your pc to the same server? i'm assuming speedtest.net or something like that?

This is strange as for my G900I I've been able to run an Internet speedtest at over 11 MBps (88mbps) over wifi on wireless N at my university which I imagine would have multiple connected devices. Wireless AC should be able to at least match the 88 mbps I had achieved.

Isriam said:
can you test with no encryption? wep/wpa completely off.
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No, don't do this. You must setup a WPA2 security encription to get maximum rates on WiFi N and AC.
Then, remove storage bottlenecks. Don't use a external HDD connected to a USB2 port. Much less on the same router, since USB performance is much lower on those devices. You will need to use 2 devices on the same LAN. One wired for maximum throughput tests. A ramdisk or a SSD on the host would help too, since HDDS are limited to 120-80Mb/s transfer speeds.
If you are going to use a file copy as measure, make sure you make it into the internal SD card of the phone, since external will be limited to around 8-12mb writes depending on the card quality.
To test networks you would need ramdisk to ramdisk copies, but I don't know how to setup this on android.

This is rather interesting to follow

iPerf is available on android.
Quick measurement gave me ~110-169 Mbits/sec using default values on 40mhz WiFi N 5ghz setup.

drapos said:
iPerf is available on android.
Quick measurement gave me ~110-169 Mbits/sec using default values on 40mhz WiFi N 5ghz setup.
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Thumbs up. Finding someone that uses IPERF for measuring proper network performance is golden. It irritates the heck out of me to find video's of people using ookla to measure their network speed, or like the OP, measuring against USB2. That's like measuring the speed of your new 600MB/s SSD installed on a SATA 1 controller and wondering why you are not seeing a significant improvement.

iperf is a little more complex than ookla though, and thats usually why. same reason most of us dont compile our own custom roms
really, there isn't much need to get over 100mbs on wifi for 90% of the public.

Isriam said:
iperf is a little more complex than ookla though, and thats usually why. same reason most of us dont compile our own custom roms
really, there isn't much need to get over 100mbs on wifi for 90% of the public.
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Just picked up the s5 because no store will sell me the note 4 retail price.
Linksys WRT1900ac stock firmware, 5Ghz a/c connected @ 300Mbit
From the phone to wired linux box @ 1000Mbit
187 Mbit up 207 Mbit down but of course it fluctuates. I don't use wifi for anything that requires that much bandwidth anyway, but I do get my full internet speed of 175/30 using the phone.

This post is rather old, but some of us may still be interested.
I was looking for an alternative to usb cable to transfer files fast between a pc and galaxy S5..
I've used a wifi-300 stick connected to usb port on PC: TL-wn821N, and configured my S5 as a mobile access point.
An ftp server is running on the phone and an ftp client on PC. i am accessing the AP via AirmoreAP hotspot, with wpa encryption.
I am watching the download rate via crystal internet meter for windows.
And this is the result: 64mbps/56 mbps (DL/UL) UL reading a microsd card on phone and writing to sata2 internal disk on pc.
I am wondering if I can reach much faster speed with a wifi-ac stick.

Wireless problems

Hi, I hope there are some experts here regarding wireless connections here.
Whenever I connect with my OP3T (OOS Beta6) and supposedly strain the connection by downloading stuff in games, my connection gets lost, and every other PC/notebook will won't have connection either anymore until I reset the Wlan signal on the router.
I tried to use a wifi analyzing tool, switched channels, doesn't help. It only supports 2.4Ghz also, maybe a factor?
On the phone, I activated detailed protcolling and always get following statements.
Code:
network_selection_disabled_association_rejection =2
network_selection_disabled_authentication_Failure =2
network_selection_disabled_association_rejection =1
What's the issue? Is the Router too weak, or what can I do with the OP3T to not kill the Wlan?
It's really annoying, I cannot really use Wifi with the phone.

Oh, additional info: So far it is just a game, Real Racing 3, which kills my router.
When downloading apps from Google Playstore or testing the internetspeed, everything is fine.

This is not the phone that's causing it, rather some strange bug with your router. It only has 2.4GHz? You probably should get yourself a more modern router in that case.