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10 วิธีเพิ่มความแรงสัญญาณ Wifi ให้ Windows
1. Position your wireless router (or wireless access point) in a central
When possible, place your wireless router in a central location in your home. If your wireless router is against an outside wall of your home, the signal will be weak on the other side of your home. Don't worry if you can't move your wireless router, because there are many other ways to improve your connection.
ถ้าเป็นไปได้ให้วาง access point , router อยู่กลางบ้าน(ห้อง)
2. Move the router off the floor and away from walls and metal objects (such as metal file cabinets).
Metal, walls, and floors will interfere with your router's wireless signals. The closer your router is to these obstructions, the more severe the interference, and the weaker your connection will be.
อย่าวาง AP,Router ใกล้โลหะ กำแพง หรือมีพื้นกั้น เพราะสิ่งเหล่านี้จะรบกวนสัญญาณ
3. Replace your router's antenna.
The antennas supplied with your router are designed to be omni-directional, meaning they broadcast in all directions around the router. If your router is near an outside wall, half of the wireless signals will be sent outside your home, and much of your router's power will be wasted. Most routers don't allow you to increase the power output, but you can make better use of the power. Upgrade to a hi-gain antenna that focuses the wireless signals only one direction. You can aim the signal in the direction you need it most.
เสาสัญญาณปกติเป็นแบบ omni-directional ซึ่งกระจายสัญญาณออกทุกทิศทางและถ้าสาง AP ไว้ใกล้กำแพง สัญญาณครึ่งหนึ่งจะออกไปนอกบ้านซึ่งเปล่าประโยชน์
เปลี่ยนเสาสัญญาณเป็นแบบ hi-gain ทำให้สามารถส่งสัญญาณไปในทิศทางหนึ่งๆได้
4. Replace your computer's wireless network adapter.
Wireless network signals must be sent both to and from your computer. Sometimes, your router can broadcast strongly enough to reach your computer, but your computer can't send signals back to your router. To improve this, replace your laptop's PC card-based wireless network adapter with a USB network adapter that uses an external antenna. In particular, consider the Hawking Hi-Gain Wireless USB network adapter, which adds an external, hi-gain antenna to your computer and can significantly improve your range.
Laptops with built-in wireless typically have excellent antennas and don't need to have their network adapters upgraded.
ปกติสัญญาณจาก AP แรงพอที่จะมาถึงอุปกรณ์ แต่บางทีอุปกรณ์มีสัญญาณไม่แรงพอทีจะส่งไปถึง AP จึงอาจเปลี่ยน adapter เป็นแบบ USB ที่มีเสาสัญญาณภายนอก
Notebook ที่รองรับ Wifi มีเสาสัญญาณดีพออยู่แล้ว
5. Add a wireless repeater.
Wireless repeaters extend your wireless network range without requiring you to add any wiring. Just place the wireless repeater halfway between your wireless access point and your computer, and you'll get an instant boost to your wireless signal strength. Check out the wireless repeaters from ViewSonic, D-Link, Linksys, and Buffalo Technology.
ใช้ repeater ช่วยเพิ่มและกระจายสัญญาณ
6. Change your wireless channel.
Wireless routers can broadcast on several different channels, similar to the way radio stations use different channels. In the United States and Canada, these channels are 1, 6, and 11. Just like you'll sometimes hear interference on one radio station while another is perfectly clear, sometimes one wireless channel is clearer than others. Try changing your wireless router's channel through your router's configuration page to see if your signal strength improves. You don't need to change your computer's configuration, because it'll automatically detect the new channel.
เปลี่ยน channel เพราะบาง channel อาจถูกรบกวนโดย AP ตัวอื่น เลือก channel ที่ดีไม่ถูกรบกวนจะให้ความแรงดีขึ้น
7. Reduce wireless interference.
If you have cordless phones or other wireless electronics in your home, your computer might not be able to "hear" your router over the noise from the other wireless devices. To quiet the noise, avoid wireless electronics that use the 2.8GHz frequency. Instead, look for cordless phones that use the 5.8GHz or 900MHz frequencies.
ลดสัญญาณรบกวนโดยถ้าที่บ้านมีการใช้โทรศัพท์บ้านไร้สายที่ใช้ความถี่ 2.4-2.8 GHz (ซึ่งใกล้เคียงกับมาตราฐาน 802.11 ) ใหเปลียนเป็นแบบใช้ความถี่ 5.8GHz หรือ 900MHz แทน
8. Update your firmware or your network adapter driver.
Router manufacturers regularly make free improvements to their routers. Sometimes, these improvements increase performance. To get the latest firmware updates for your router, visit your router manufacturer's Web site.
Similarly, network adapter vendors occasionally update the software that Windows XP uses to communicate with your network adapter, known as the driver. These updates typically improve performance and reliability. To get the updates, visit Windows Update, and then click Select Optional Hardware. Install any updates relating to your wireless network adapter. It wouldn't hurt to install any other updates while you're visiting Windows Update, too.
ทำการอัพเกรด firmware หรือ driver ของ adapter อย่างสม่ำเสมอ
9. Pick equipment from a single vendor.
While a Linksys router will work with a D-Link network adapter, you often get better performance if you pick a router and network adapter from the same vendor. Some vendors offer a performance boost of up to twice the performance when you choose their hardware: Linksys has the SpeedBooster technology, and D-Link has the 108G enhancement.
เลือกใช้อุปกรณ์ยี่ห้อเดียวกันทั้งหมด (AP,router,adapter)
10. Upgrade 802.11b devices to 802.11g.
802.11b is the most common type of wireless network, but 802.11g is about five times faster. 802.11g is backward-compatible with 802.11b, so you can still use any 802.11b equipment that you have. If you're using 802.11b and you're unhappy with the performance, consider replacing your router and network adapters with 802.11g-compatible equipment. If you're buying new equipment, definitely choose 802.11g.
ใช้ 802.11g ดีกว่า 802.11b
from //www.microsoft.com/athome/moredone/wirelesstips.mspx
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