CodePudding user response:
First of all, the problems related to environment and equipment, Intel Centrino (R) (R) Wireless - N 2200 is Wireless single frequency devices, Wireless mode to b/g/N, can work under 2.4 g, Intel official data shows the maximum speed is 300 megabits per second (see below link)https://ark.intel.com/zh-cn/products/66888/Intel-Centrino-Wireless-N-2200-Single-Band
Next, want to work in 300 MBPS mode device must support 2 x2 40 MHZ tx 2 rx (two receiving antenna and transmitting antenna, the working frequency of 40 MHZ), should be detailed in the following link to your device with this condition
https://www.intel.cn/content/www/cn/zh/support/articles/000005725/network-and-i-o/wireless-networking.html? ProductId=66888 & amp; LocaleCode=cn_zh
Again, as a result of 802.11 n is divided into 5 GHz and 2.4 GHz two different frequencies, the actual rate will be affected by the comprehensive environmental factors such as, for example a wireless router, wireless AP, bluetooth devices, magnetic environment, etc., when the current network load is bigger, also can't guarantee rate can reach theory, 300 MBPS is a laboratory to obtain a theoretical value, but usually use environment and experimental environment difference is bigger, average link speed higher than 54 MBPS, we can be judged as normal, there is no guarantee that any time achieves maximum nominal value 300 MBPS, access speed changes with the environment in real time automatically,
Finally, 2.4 G frequency channel is now more crowded, change the well-known built-in multifrequency card also however 100 yuan, with conditions in 5 G environment swimming on the 2.4 G for why? (5 g still need 5 g wireless environment, such as support of 5 g wireless router, wireless AP equipment)