WiFi的2.4G、5G、6G频段 |
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目前WiFi已经推出了6G频段,Android源码中也增加了相关的功能，这里总结一下。 2.4G一共分为14个信道（1-14），从2412到2484，每个信道的有效宽度是 20MHz，另外还有2MHz的强制隔离频带（类似于公路上的隔离带）。即，对于中心频率为 2412 MHz 的1信道，其频率范围为2401~2423MHz。 5G一共有60个信道（32-173），从5160到5865，在中国支持的5G信道为36 38 40 44 46 48 52 54 56 60 62 64，后六个是DFS。 6G为1-233，从5946到7105。大概为1.2GHz的总带宽，可以分成15个80MHz的频谱。 Android源码中对2.4g、5g、6g的定义： ScanResult.java public static final int BAND_24_GHZ_FIRST_CH_NUM = 1; /** * 2.4 GHz band last channel number * @hide */ public static final int BAND_24_GHZ_LAST_CH_NUM = 14; /** * 2.4 GHz band frequency of first channel in MHz * @hide */ public static final int BAND_24_GHZ_START_FREQ_MHZ = 2412; /** * 2.4 GHz band frequency of last channel in MHz * @hide */ public static final int BAND_24_GHZ_END_FREQ_MHZ = 2484; /** * 5 GHz band first channel number * @hide */ public static final int BAND_5_GHZ_FIRST_CH_NUM = 32; /** * 5 GHz band last channel number * @hide */ public static final int BAND_5_GHZ_LAST_CH_NUM = 173; /** * 5 GHz band frequency of first channel in MHz * @hide */ public static final int BAND_5_GHZ_START_FREQ_MHZ = 5160; /** * 5 GHz band frequency of last channel in MHz * @hide */ public static final int BAND_5_GHZ_END_FREQ_MHZ = 5865; /** * 6 GHz band first channel number * @hide */ public static final int BAND_6_GHZ_FIRST_CH_NUM = 1; /** * 6 GHz band last channel number * @hide */ public static final int BAND_6_GHZ_LAST_CH_NUM = 233; /** * 6 GHz band frequency of first channel in MHz * @hide */ public static final int BAND_6_GHZ_START_FREQ_MHZ = 5945; /** * 6 GHz band frequency of last channel in MHz * @hide */ public static final int BAND_6_GHZ_END_FREQ_MHZ = 7105; |
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