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file transfer over wifi, very spiky speed. normal?

post #1 of 5

7/16/12 at 7:10pm

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ihatelolcats
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it is a single mkv movie file. using teracopy
transferring from my computer wired to the router then over wireless n to the target
doesn't look too good to me

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CPU	Motherboard	Graphics	RAM
FX-8320	Asus Crosshair V Formula	XFX 7870 2GB DD	4GB Samsung 30nm (2)
Hard Drive	Hard Drive	Hard Drive	Optical Drive
SAMSUNG Spinpoint F1 320GB	Hitachi Desktstar 1TB	Crucial M4 128GB	LITE-ON IHAS124-04
Cooling	Cooling	Cooling	OS
Thermalright Archon	Yate Loon D14-SM12 (2)	Gelid Wing 14 UV Blue fan	Windows 8 pro x64
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Acer H213H 21.5"	Filco Magestouch MX Brown Tenkeyless	Corsair TX750 v2	CoolerMaster HAF-XB
Mouse
Logitech G400
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CPU	Motherboard	RAM	Hard Drive
Phenom II x4 955	Asus M3N78 PRO	2GB Corsair XMS2-8500 DDR2 5-5-5-15 (2)	Western Digital
Hard Drive	Cooling	OS	Keyboard
Samsung HD204UI	Xigmatek 120mm rifle	win7 x32	Logitech wireless ex100
Power	Case	Mouse	Other
Corsair CX430 v2	Antec 300	Logitech wireless optical	Patriot PCBOWAU2-N Wireless LAN USB Adapter
Other	Other
Linksys E1000-RM N 2.4GHz 300Mbps 2T2R Wireless...	Asus Network Switch GX1005B 5 Port Desktop Unma...
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post #2 of 5

7/16/12 at 8:01pm

beers

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Looks pretty normal to me.
I just did a LAN transfer over wifi so you have another point of reference:

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post #3 of 5

7/16/12 at 9:07pm

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ihatelolcats
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hmm. i wonder what causes that. i would be happy if i had your bandwidth

CPU	Motherboard	Graphics	RAM
FX-8320	Asus Crosshair V Formula	XFX 7870 2GB DD	4GB Samsung 30nm (2)
Hard Drive	Hard Drive	Hard Drive	Optical Drive
SAMSUNG Spinpoint F1 320GB	Hitachi Desktstar 1TB	Crucial M4 128GB	LITE-ON IHAS124-04
Cooling	Cooling	Cooling	OS
Thermalright Archon	Yate Loon D14-SM12 (2)	Gelid Wing 14 UV Blue fan	Windows 8 pro x64
Monitor	Keyboard	Power	Case
Acer H213H 21.5"	Filco Magestouch MX Brown Tenkeyless	Corsair TX750 v2	CoolerMaster HAF-XB
Mouse
Logitech G400
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CPU	Motherboard	RAM	Hard Drive
Phenom II x4 955	Asus M3N78 PRO	2GB Corsair XMS2-8500 DDR2 5-5-5-15 (2)	Western Digital
Hard Drive	Cooling	OS	Keyboard
Samsung HD204UI	Xigmatek 120mm rifle	win7 x32	Logitech wireless ex100
Power	Case	Mouse	Other
Corsair CX430 v2	Antec 300	Logitech wireless optical	Patriot PCBOWAU2-N Wireless LAN USB Adapter
Other	Other
Linksys E1000-RM N 2.4GHz 300Mbps 2T2R Wireless...	Asus Network Switch GX1005B 5 Port Desktop Unma...
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CPU	Motherboard	Graphics	RAM
FX-8320	Asus Crosshair V Formula	XFX 7870 2GB DD	4GB Samsung 30nm (2)
Hard Drive	Hard Drive	Hard Drive	Optical Drive
SAMSUNG Spinpoint F1 320GB	Hitachi Desktstar 1TB	Crucial M4 128GB	LITE-ON IHAS124-04
Cooling	Cooling	Cooling	OS
Thermalright Archon	Yate Loon D14-SM12 (2)	Gelid Wing 14 UV Blue fan	Windows 8 pro x64
Monitor	Keyboard	Power	Case
Acer H213H 21.5"	Filco Magestouch MX Brown Tenkeyless	Corsair TX750 v2	CoolerMaster HAF-XB
Mouse
Logitech G400
View all

CPU	Motherboard	RAM	Hard Drive
Phenom II x4 955	Asus M3N78 PRO	2GB Corsair XMS2-8500 DDR2 5-5-5-15 (2)	Western Digital
Hard Drive	Cooling	OS	Keyboard
Samsung HD204UI	Xigmatek 120mm rifle	win7 x32	Logitech wireless ex100
Power	Case	Mouse	Other
Corsair CX430 v2	Antec 300	Logitech wireless optical	Patriot PCBOWAU2-N Wireless LAN USB Adapter
Other	Other
Linksys E1000-RM N 2.4GHz 300Mbps 2T2R Wireless...	Asus Network Switch GX1005B 5 Port Desktop Unma...
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post #4 of 5

7/17/12 at 3:03am

proedros
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"This behavior is called dynamic rate scaling, a design feature of WiFi networks. When a computer is connected via Wi-Fi, the network data rate is set and changes automatically as the quality of the wireless signal changes.

Dynamic rate scaling extends the range at which wireless devices can connect to each other.

For example, an 802.11b WiFi computer in close proximity to a router will often connect at 11 Mbps as shown on the computer's wireless configuration screens. If the computer is moved further away from the router, the connection speed will automatically reduce from 11 Mbps to 5.5 Mbps, and sometimes lower.

Were this device to maintain a 11 Mbps connection across too far of a distance, the connection would fail and drop.
Factors that determine which dynamic data rate is chosen for a WiFi device at any given time are:

1) distance between the device and other WiFi communication endpoints
2) radio interference in the path of the WiFi device
3) physical obstructions in the path of the WiFi device, that also interfere with signal quality
4) the power of the device's WiFi radio transmitter/receiver

Home WiFi equipment always uses the dynamic data rate scaling feature; a network administrator cannot disable it. "

post #5 of 5

7/17/12 at 7:41am

beers

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Quote:

Originally Posted by proedros

"This behavior is called dynamic rate scaling"

Would you argue this if the same behavior was indicated with the device a couple of feet from the access point?
I was more under the assumption it was the CDMA/CA mechanism avoiding collisions on a particular frequency.

CPU	Motherboard	Graphics	RAM
AMD FX 8350 @ 4.8	Asus Crosshair V	1x 2 GB Radeon 6950	16 GB Ripjaws X 2133
Hard Drive	Optical Drive	Cooling	OS
240 GB SanDisk Extreme	24x LG DVDRW	Corsair H100	Windows 8 x64 Pro
Monitor	Keyboard	Power	Case
27" Asus VE276Q	Logitech K350	Seasonic x750	Corsair Graphite 600T
Mouse	Audio
Logitech Performance MX	Logitech G930
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CPU	Motherboard	Graphics	RAM
1.7 GHz Samsung Exynos 5	Samsung Chromebook 3	ARM Mali-T604	2 GB DDR3L
Hard Drive	OS
16 GB SSD	Chrome OS
View all

hide details

CPU	Motherboard	Graphics	RAM
AMD FX 8350 @ 4.8	Asus Crosshair V	1x 2 GB Radeon 6950	16 GB Ripjaws X 2133
Hard Drive	Optical Drive	Cooling	OS
240 GB SanDisk Extreme	24x LG DVDRW	Corsair H100	Windows 8 x64 Pro
Monitor	Keyboard	Power	Case
27" Asus VE276Q	Logitech K350	Seasonic x750	Corsair Graphite 600T
Mouse	Audio
Logitech Performance MX	Logitech G930
View all

CPU	Motherboard	Graphics	RAM
1.7 GHz Samsung Exynos 5	Samsung Chromebook 3	ARM Mali-T604	2 GB DDR3L
Hard Drive	OS
16 GB SSD	Chrome OS
View all

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