Antes de fazer qualquer coisa, você deve fazer o checkout Como aumentar o sinal do roteador Há algumas boas dicas e sugestões sugerido anotado lá:
Look for Interference
Replace devices in your home that can interfere with network traffic on the 2.4GHz frequency range.
Cordless phones,
Microwave ovens.
Baby monitors.
Security alarms.
Television remote controls.
Automatic garage door openers.
Check your router's signal strength with these devices. Compare power levels when each device is on and off to determine if they are the cause of your signal problems.
Switch Channels
Change your signal channel. Routers can broadcast on a series of channels, between one and eleven. Change to a channel that will allow your router a clear signal between other wireless networks.
Use a software utility to analyze which networks are using which channel and configure your system for an unused channel.
802.11n
- Change your router's network broadcast mode. Try to use the new 802.11n standard if your router supports it. The 802.11n standard offers far greater range and signal strength compared to 802.11 a/b/g.
Relocate
Reposition your Router. Sometimes the solution is simple. All you have to do is find a new place to store your router.
Raise up as far as possible to increase the effective broadcast range.
Place near the center of your house or apartment for wider coverage.
Move closer to the receivers, if possible.
Move away from any metal including metal shelving, filing cabinets and similar common objects.
Move away from cordless phones and microwaves, which operate on the same 2.4-Ghz frequency.
Be aware of external interference. Move your unit as far away as possible from your next door neighbor's Wi-Fi router. And if you're living in an apartment building, there might be multiple routers in operation too. Note: make sure you're using a different channel than everyone else.
Upgrade
Raise your transmit power. Check your router's documentation and configuration utility for the ability to change the Xmit power of your router: the amount of power it uses to transmit the signal. Generally you can boost this number by up to 50mW. Keep in mind that you risk overheating or damaging your router.
Replace the Antenna. Unscrew and replace the broadcast antenna on your router with a model that delivers more power. Not all routers allow for new antenna to be attached, but many do.
Install a Repeater. A repeater is a piece of hardware that acts like a wireless network expander. The repeater takes the signal from your router and boosts it to increase the range.
Wireless repeaters are increasingly common and affordable and will probably be available in your local computer store, or on the Internet.
Install a Wireless Amplifier. Attach a wireless amplifier, also known as a booster, directly to your router. A booster can be more affordable than a repeater as they only increase the strength of your existing signal, rather than the strength and range.
Use a bi-directional amplifier to increase both your inward and outbound speeds.
A reflector made from tinfoil and some stiff paper cut out of junk mail.Make a Reflector lulu with Tinfoil. Note that a tinfoil router may boost your signal, but will also make it more directional.
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Além disso, se o seu modem a cabo for realmente antigo e problemático de outras maneiras, você poderá substituí-lo por um modem mais novo.
Se você estiver satisfeito com o seu modem atual, além de seu alcance sem fio, sempre poderá desativar o Wi-Fi no seu modem atual e comprar outro ponto de acesso sem fio melhor e conectá-lo a uma porta LAN no seu modem a cabo.