5G 系統向下相容性？ - 手機討論
By Xanthe
at 2020-01-17T12:57
at 2020-01-17T12:57
Table of Contents
小弟門外漢看到5G頻譜大戰好不熱鬧
也對未來的無線通訊充滿期待
目前各家5G 擁有的頻段不外乎 3.5G與 28GHz
加上4G 700/900/1800/2100/2500mHz
看聯發科跟高通的晶片規格
5G本身 3.5G跟28G 做CA(載波聚合)應該沒問題
那麼是否有辦法4G/5G做CA或是無縫切換呢？
以及之前各家標的4G頻段 如果要挪一些來跑5G 可以嗎？
或是就只能各自使用不能升級？
會這麼問主要是因為5G本身也是延伸自 4G LTE-A, 那麼頻譜或是設備本身會有4G 1800跟5G 1800的使用差別嗎？
個人的小疑問…
5G 1800沒人要標是因為之前有規定 4G 總頻寬1/3上限 所以無法再買(這時候4G/5G頻寬又要一起算了？)
請各位業內的先進大大 幫忙解惑
感激不盡！
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Sent from JPTT on my Asus ASUS_I01WD.
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