Dropping Wifi in Large Building Solution? - Networking

Hi,
I lose my wifi connection on my android phone and tablet when I move from one part of a building to the other. My connection is perfectly fine if I don't move.
My phone and tablet eventually say, "connecting to wifi" and hangs there until I turn off my wifi and then turn it back on.
Here is the detailed story:
I work in a large building with multiple floors. I assume there are multiple routers per floor. My office is on the top floor and my lab is on the first floor. I make multiple trips between floors per hour, and it gets annoying to constantly reset the wifi receiver in my phone. Since this problem happens on my phone and my tablet, I'm sure it's not phone specific. I'm also guessing that no one else notices because they all pay outrageous prices for 4G and don't use wifi on their phones. They don't see problems on their laptops because their laptops are asleep when moving between floors.
After a little research, I think the cause might be when I move from one router in my building to another, my phone wants to keep the DHCP IP, but the new router won't accept my phone, because my phone is already connected to the old router. When I reset the wifi receiver on my phone, I reset the DHCP IP. Is this correct?
Is there an android app that says, "if connecting to wifi network takes longer than 20 seconds, reset the wifi receiver?"
Thanks,
Daniel

Are the SSID's of all the routers the same?

wifi administrator is not familiar with WDS function i assume.. best user friendly system would be Ubiquity Unifi or Mikrotik WDS Mesh.

I work in an office with three old Cisco Aironet 1130 access points and have no problem moving between them with my Sensation.
They're all on the same SSID and on the same subnet.
If I leave the building at one end, go outside and lose Wifi connection, then come in at the other end of the building, my phone just re-connects.
When your phone connects to a network it should always go through the process of requesting an IP address even if the lease hasn't expired.
Potentially what could happen is your office is serviced by one SSID, while your lab is serviced by another, and your phone is just able to talk to the other wifi network so doesn't release itself and renew with a new IP address.

Related

Wifi slow to connect (Raphael, Wizard and Tornado)

I gotta know if anyone else is having the same problems connecting to wifi as I am. Whenever I try to connect to my wireless network with any of my devices, it's sporadic. Sometimes it'll connect right away. Most of the time, it takes two or three minutes (!) and sometimes it'll puke on itself and say it doesn't see the network.
In the latter two cases, I can delete the profile for the network and power-cycle the device and it'll connect to the network almost immediately. As you might guess, this is an annoying process to go through.
It never really bothered me until my wife got an iPhone and it connected immediately to the network and does so EVERY TIME SHE USES IT!
Can anyone help me out? Why do these devices take so darn long to connect?
This is the second router I've used (first was a Linksys, currently I'm using a Trendnet), the Raphael (Fuze) and Tornado (SDA) are running their stock ROMs. The Wizard (MDA), I've gone a little flash-happy on, but I've encountered the same problem with all ROMs I've tried.
I'll admit I haven't checked what channels neighboring wifi networks are using (I'm pretty sure I'm the only one on my channel), but when I first got my Tornado and Wizard, mine was the only network (visible) and I was still having problems. And regardless, is the wifi radio in the iPhone that much better than my HTC devices?
(Just a side note, I have three wireless laptops that are all able to connect to the router without a hitch, adding to my belief that my network is on its own channel.)
Just wanted to update everyone that, last night, I checked the wireless networks I could see from my house and none share the same channel as mine, however I didn't take overlap into consideration. The lack of response to this thread would suggest to me I'm the only one encountering this type of problem, so I'll do some experimenting in an area with no other wireless activity and see if connecting is still slow.
O.K. I tested the Wizard and Raphael with a router in an area with no other wireless activity and discovered the following:
If the devices are set for DHCP, it takes a long time to connect. However, they did connect and remain connected without any problems.
If the devices have static IP addresses, they connect immediately and remain connected without any problems.
Conclusion:
The DHCP discovery on these devices takes too darn long to acquire addresses. That, and the slightest bit of EM noise can cause them to crap out. Since I don't have problems with other wireless devices (laptops, iPhone), I'm left with the assumption that either the radio is poor quality (unlikely) or the driver needs some serious fixing (most likely).
When and if the noble developers of this board get linux up and running on the Raphael, I'll be more than happy to test it out.
Since this thread was self-answering and would seem to be of little value, please feel free to delete it, moderators.

[Q] Reboot router to connect to Wifi

I'm puzzled by the behavior of my phone. For probably a week at a time, I go to work, connect to a WIFI there, then come home, connect to a WIFI there. No problems at all.
Then it seems like after a week or so of 'being good' sometimes I'll wake up the phone and it will see the network, but will not connect to it, asks for passphrase repeatedly (WPA2-AES Cisco E3000 router) but just will not connect. I have found no way to trigger the phone to reconnect (and I refuse to do another hard reset because that is no solution at all).
The simple fix is to reboot the router. Presto, the phone will connect almost immediately.
I am willing to accept that maybe something is wrong with my router, although I have 3 laptops and a couple of IP cameras, and an Xbox that connect wirelessly all the time, and I never ever see this refusal to connect on any of those devices, and my wife's Blackberry will also connect whenever. So I'm thinking its my phone.
So for the experts out there, what is it about rebooting the router that fixes the problem?
I only recently learned how to get into the manufacturer's special app, so I'm going to pay attention to my IP address next time I have an issue, and see if it actually changes when I reboot after this problem occurs again.
Where does one discover how and what can be tweaked in the secret app? I'm cautious but not afraid....hey, I've edited the windows registry countless times on my PC and never toasted the OS yet! Does that count for something?
Add: I had this happen once at my work WIFI, using an ancient DLink router using WEP. At the time, I was trying out a bluetooth headset (Plantronics Backbeat), which worked, albeit, after I was done listening to the podcast, be darned if I didn't get into this refusal to connect thing, and unbeknownst to me, I was using the 3G data connection for what I thought was a wifi broadcast. That sucked 175 megs that day! I was a bit pissed about that. I have not used the Bluetooth since then.
Rebooting my router at work fixed the problem but I hate doing that, because I've got other equipment on that network that likes to be permanently connected.
the same happened to a frined of mine: interoperability issues with that model of router and the phone, changed the router and after everything worked perfectly, that sucks, but it is
Had a similar problem, and simply could not pinpoint the cause. Solution? I resetted my router to factory settings, and started to change all the settings from scratch to my desired settings. One thing that helped solve my problem was that I changed the default IP address used by the router (in my case, 192.168.0.1) as well as the IP range to something more ... random. Also, I limited the number of allowed IPs to 10 rather than the default 100...That helped. Never got a disconnect or problem connecting again. I had the same thing happen on my mother's iPhone and my brother's Galaxy S, and this solved it.

Major WiFi connection issue

Hi
I've had a search in the forums but haven't seen any other posts re. this but wondered if anyone had any ideas?!
Basically I'm having problems connecting to some networks with my Tab 10.1 (stock, updated OTA to the latest TouchWiz UX last week).
I first had a problem last week when I took the device into work - there's an 802.1x EAP network there but it wouldn't even show up in the network list. My SGS2 connects to it without an issue.
Then when I got home tonight (after happily using it at my parents' house during the day) I found it wouldn't connect to my home WiFi (hidden SSID, WPA2). It had connected to this network fine in the past, but now was just sitting showing it as 'not in range' network. At first I thought it might be a router issue (it used to be a little flaky), but then I saw that my iPod and SGS2 were both connecting and working on it without a hitch.
I couldn't see the network at all in WiFi Analyzer (similarly to at work), although it was showing my neighbours' WiFi networks fine. I tried deleting the saved entry and telling the router to broadcast the SSID but it still wouldn't work.
I then put on my WiFi hotspot on my SGS2 (also a previously remembered connection) and it worked absolutely fine!
Does anyone have any ideas where to go next apart from doing a full reset? (which although not the end of the world would be quite a pain).
Thanks for any suggestions/tips!
OK, bit the bullet and restore my device to factory settings - it STILL can't see my home WiFi, despite my SGS2, laptop and iPod all connecting to it fine. It is however showing up two networks belonging to neighbours and also my SGS2 if I put it in WiFi hotspot mode!
Any suggestions folks??
Sounds like a route issue, did you reboot the router? Is the router on a channel below 12?
Hi thanks for the reply!
I actually just spotted a post at http://www.thegalaxytabforum.com/index.php?/topic/5511-my-wifi-no-longer-works/ with the same issue.
It looks like Samsung have mucked something up when they made the Touchwiz UX update - it now blocks WiFi channels 12 upwards, when the old stock Honeycomb firmware didn't do this. I'd moved my router onto 13 to reduce congestion and I guess the work one must be on 12/13 too.
I can see from the table at http://en.wikipedia.org/wiki/List_of_WLAN_channels that 12/13 are only allowed under low-power conditions in the USA, but this isn't the case elsewhere so they shouldn't have locked it down outside of the USA.
This also happend to me
pwhooftman said:
Sounds like a route issue, did you reboot the router? Is the router on a channel below 12?
Click to expand...
Click to collapse
As I had setup an additional router in my house (with assigned a high numbered -or so i thought- fixed IP address) for some reason my main router tryied unseccesfully to assign the same IP to my SGT as the router. This had obviously conflicts and could not log in.
Went into the router eliminated the fixed IP address and voilá! it got working again, all IP a dinamic!!
Regards

Looking for a way to block specific WiFi signals.

I live very close to a hotel which has multiple SSID's that keep interfering with my ability to stay connected to my router.
I've tried hard coding a static ip on the phone, adding the mac address to router, even went as far as creating a separate unhidden network just for the phone. So far, nothing has worked.
So i was thinking that maybe there's a way to have the phone ignore certain signals, lock on to a preferred one or use WiFi but turn off the scanning feature. The only problem is that I haven't been able to find any settings or Apps that will allow me to do it.
So, if anyone has any ideas or suggestions as how, or if, I can make this work, I would greatly appreciate it.
I'm using a Droid 2 Rooted with 2.3.3 and have a Netgear N750 router.
BTW - none of the computers in the house are having this issue.
Sent from my DROID2 using XDA App
So, are you saying the phone constantly tries to leave your home wifi in favor of attempting to connect to the hotel's?
Yes, unless I'm within about 5 feet of my router, the hotel's signal makes the phone keep dropping and reconnecting over and over again.
Sent from my DROID2 using XDA App
Are the hotel's hotspots not WEP secured? That is so odd. If they're unsecured hotspots go over to the hotel and tell them to get their sh*t in order. Otherwise I'm out of ideas, sorry.
No, they are secure. WPA2 as is mine. I don't connect to them. My phone just detects them, drops my connection and tries to connect to them. So that leaves me with no connection and having to use 3G.
But there may be an easier solution to this. After spending a few hours on the Netgear site, it turns out that there is a bug in their firmware that causes signal strength fluctuations. They said a new release should be available in a few weeks.
In the meantime I've changed the channel on the router to auto select which seems to be helping.
I do appreciate you taking the time to assist.
Thanks!
Scott
Sent from my DROID2 using XDA App
Glad there's at least some kind of work around, wish I was of more assistance.
Having a similar problem with a samsung galaxy sii - current internet configuration is through AT&T U-Verse with built in Wireless G router in there Gateway. tried adding a Netgear dual band N router to my network and with the netgear's 2 wifi signals on then my phone just constantly goes into scanning mode and keeps trying to connect between the 3 - things work fine with the wifi turned off in the new netgear kind of defeating the purpose of me installing it - was hoping to have the phone use one of the N signals..
Block bt openzone connection pleaseee!
Desperately need an app for this? Is it not going to be possible for a way to block certain wifi signals because I'm actually going to rip next doors BT openzone router out of the wall and get a hammer to it! My HTC desire hd is insistent on connecting to its poor signal over our excellent one and the worst part is that you can't actually access the network unless you pay BT for a user account! Grrrr.... Please help
Try to connect the network you dont want, then go to wifi management in settings. Long press on the network you dont want and hit forget network. Then your phone shouldnt automatically connect to it unless you tell it to.

WiFi disconnecting issue

Well this is weird, my new note is now disconnecting from my WiFi router after a short period of inactivity. This just started a couple days ago (just before this new 2nd firmware update). I'm not sure how long it takes to happen, but it's somewhere close to an hour. When I find my tablet disconnected, the notifications tell me that there are networks available in one notification and that my crudentials timed out in another. It will not automatically reconnect to my router either, so I have to go and reconnect to it manually each time...and it's a pain in the yang.
The odd thing is, it remembers the WiFi password, so it's not like it completely dumped the settings. So in theory, it should reconnect automatically since it still remembers the network and password.
It could just be my router, but my SIII and my laptop have never had this issue. I checked the settings to see if I was in power save mode or anything...but I'm not.
Any suggestions appreciated.
Well, I have tried restarting the tablet and the router...both to no avail.
This is getting frusterating now. I simply watched an epsiode of the Walking Dead and it killed my connection while doing that...WTF? It also did it later while my tablet was downloading a bunch of updates, so a few of those updates didn't download because the connection died after a while.
Why would it do this even when the tablet and the connection are active?
I am having the same issue, but it isn't my Note dropping the connection, it is my router rebooting.
Next time it happens, log into your router and check on the router uptime to see if it just reset.
What router do you have?
Mine is a D-Link DIR-655
Qzic said:
I am having the same issue, but it isn't my Note dropping the connection, it is my router rebooting.
Next time it happens, log into your router and check on the router uptime to see if it just reset.
What router do you have?
Mine is a D-Link DIR-655
Click to expand...
Click to collapse
I have the same router, but it's not doing what yours is doing (my uptime has been for over a week it says). But that does make me wonder if it is still an issue with the router...
I have been searching and some of the other samsung devices that had issues and some of them (that didn't require root) were fixed by setting the DHCP release time to 2 days (instead of holding it forever) and/or setting the ip to a static one on their phones. I plan on trying this next and letting you all know how it goes.
Yay! So the fix was to set a static IP on my tablet...that's it. My router was already set to release DHCP every 24 hours, so I didn't change any settings there. Before I did this, my connection was dropping about every 15 minutes. After setting the static IP, I let it sit for an hour and it's still holding strong.
Did you set a static IP directly on the tablet, or did you set a reserved IP on the router?
Qzic said:
Did you set a static IP directly on the tablet, or did you set a reserved IP on the router?
Click to expand...
Click to collapse
I set the static IP directly on the tablet and I have not had an issue since doing this.
Maybe you can restore your tablet to solve this problem.
does it happen on other wireless networks? what security are you using? wep/wpa?
try changing the security to see if that helps. odd that a static ip fixes it. its almost like it loses its ip configuration.
when your tablet looses network, are you actively using it, or was it in sleep mode?
john10101 said:
does it happen on other wireless networks? what security are you using? wep/wpa?
try changing the security to see if that helps. odd that a static ip fixes it. its almost like it loses its ip configuration.
when your tablet looses network, are you actively using it, or was it in sleep mode?
Click to expand...
Click to collapse
The tablet would lose connection while actively using it...it was weird.
What's even weirder is that I have NOT set other WiFi connections to static IPs like I had to do with my D-Link router, yet the connections with those other routers have remained steady while in default DHCP modes. I have no idea why this would be the case (it doesn't make sense).
Like I said earlier, my router does not have very much in the way of special settings...just WPA 2, N-only mode, and a DHCP IP release after 24 hours of inactivity are the only options I enforced. Looking at my router logs, it definitely sees my tablet and updates the release time each time I use the tablet...but I don't see anything in the logs when the tablet suddenly disconnects from the router. So I have no idea if it's the router or the tablet. lol
I have not tried another security setting, but I don't want to lessen my security in this environment. Beseides, I know at least one othe router that I connect to is using WPA2 also.
I can live with this work-around as long as I don't have to force a static IP on every other router I connect to.
I have a different model dlink (dap2553) and I have the random disconnects also. I see wifi connected normally but no data flows. Eventually the connection drops and reestablishes fine for a while..before it all happens again.
Has the static ip solved this for everyone?
Tablet works fine on all other wifi aps and all other devices work fine on my ap
I also have a DLink router (DGL 4500), mind you, it's an utter piece of crap and I plan on replacing it with an Asus ac66u sooner or later. I also have this issue where it will show connected but no data will flow for a few seconds and then everything will be fine again. Static IP hasn't really solved much for me. I'm hoping that this indeed is a router issue so I can continue to use this in peace when I replace this DLink junk.
Static IP has not solved it for me. I have been using my travel router at home which does not reset.
change the channel on your router. the channel you're on may be saturated. i've got 3 routers with no problems:
1 belkin n300+ share - stock firmware
1 asus n56u - padavan firmware
1 asus ac66r - merlin
all steady.
Same problem. Just got it today and close to returning it. Factory reset and static IP didn't help.
Wasted 90 minutes trying different things. It's just bad hardware. I even installed Kies and let it re-image the whole thing to MK1 again (very very slowly). Just sitting at the intial setup where you pick the wifi you want to connect to i can watch it disconnect and reconnect over and over. Returning it in the morning.
skrowl said:
Same problem. Just got it today and close to returning it. Factory reset and static IP didn't help.
Wasted 90 minutes trying different things. It's just bad hardware. I even installed Kies and let it re-image the whole thing to MK1 again (very very slowly). Just sitting at the intial setup where you pick the wifi you want to connect to i can watch it disconnect and reconnect over and over. Returning it in the morning.
Click to expand...
Click to collapse
I'm also getting annoyed with the wifi problem
I'm having this problem too and it's really starting to annoy me. It didn't happen when I first bought it but now I have to re - enable wifi at least 10 times a day. Wifi will turn itself off when I'm using the tablet or when the screen is off, when it happens seems to be somewhat random but it won't happen again for at least 10 minutes after I've re-enabled wifi. I have tried everything but a factory reset...
You guys either have bad wifi/router or have defective devices. Minehas been perfect.
hmmmm.....
punkmilitia said:
You guys either have bad wifi/router or have defective devices. Minehas been perfect.
Click to expand...
Click to collapse
I'm on my 4th Note 10.1 2014. All of them had this issue with a bunch of different routers/configurations.
with four acting up it's quite possible that your routers and configurations are the problem. the note may just be picky mofo and you need to tweak you wifi set up. if you don't feel like fidgeting with your network, just give up and get something that plays well with you set up. when you've got limited free time network tweaking is not oneof the fun things on my list, lol.

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