Wireless speeds - need for a sticky?
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Wireless speeds - need for a sticky?
24-09-2014 12:44 PM
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Quote There are many queries/complaints regarding wireless speeds that result from the inherent limitations of the technology combined with local conditions. It is, therefore, not possible to give definitive figures on the throughput which should be achieved.
Wireless connections are prone to problems resulting from congestion/interference and using mixed standards as a small group of frequencies are used for all "conversations". Unlike modern wired connections, which are duplex (i.e. can transmit and receive simultaneously) and point-to-point, wireless connections are usually half-duplex (i.e. can only transmit or receive at any one time unless they use different frequencies for transmit and receive) and require additional overheads to manage "collisions" between transmitting devices sharing the spectrum or switching between sending and receiving.
Each wireless channel uses 20MHz (it's own 5MHz plus 7.5MHz = 1.5 channel widths either side), hence the general advice to keep at least a 2 channel separation from other strong signals and why routers default to channels 1, 6 or 11.
The typical effect of these limitations for a single connection can be to provide a one-way data throughput as low as 1/3 the nominal bit rate (11g = 18+, 11n = 50+, 11n300 = 100+) or, in extreme conditions, much less and rarely as high as 2/3. Under good conditions, it should be possible to attain around 1/2 rate fairly consistently. However, multiple connections transferring data at the same time will share the bandwidth and increase the overheads and mixing 11g and 11n devices may result in all devices running at 11g speeds - all reducing the maximum individual device throughput.
What can you do?
There is nothing to improve bandwidth sharing, but some simple changes that could otherwise help:
- try different channels: 13, 3, 4, 8, 9, 2, 12, 5, 7, 10, 1, 6, 11 (note that channels 1 and 13 only overlap other channels on one side, but some devices are "US standard" only and cannot use 12, 13)
- try a different location for the router and/or orientation for the aerials or router (horizontal or vertical and non-aligned external aerials)
- set the mode to match your devices (e.g. 11n only)
- use WPA/WPA2 encryption (if available)
- ensure your wireless card driver is the latest
- change to 5GHz (less range), though the same problems will happen when this becomes the default
Phil
Using a TP-Link Archer VR600 modem-router.
Re: Wireless speeds - need for a sticky?
24-09-2014 12:55 PM
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++1 for the principle.
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Re: Wireless speeds - need for a sticky?
24-09-2014 1:07 PM
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Use "WPA2" only would be better.
The bit about setting some "11n only" mode is also a somewhat questionable. All this can really do is prevent your 11g devices from connecting to your own wireless network. It would likely be counterproductive to actually disable legacy protection mechanisms if 11g devices are using the same channel (on another network). So it might as well say replace old 11g adapters with 11n adapters that are at least as capable as your router, or alternatively move all your 11g devices to a separate network which must be on a different channel.
Re: Wireless speeds - need for a sticky?
24-09-2014 1:24 PM
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Re: Wireless speeds - need for a sticky?
24-09-2014 1:55 PM
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I don't have 5G capability, so based that statement on comments seen
As I said,
Quote ..... (with more accurate information):
Phil
Using a TP-Link Archer VR600 modem-router.
Re: Wireless speeds - need for a sticky?
26-09-2014 1:24 PM
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Quote Although 5GHz is capable of carrying more bandwidth (speed), its range (how far away you can get a signal) is less than half that of 2.4Ghz.
Phil
Using a TP-Link Archer VR600 modem-router.
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