India, Feb. 15 -- Getting to sleep when you're a rotating chairman can't be easy. But if it's not dizziness then what else keeps Huawei's Eric Xu awake at night?

Plenty, it would seem. What with his CFO under house arrest in Canada, his business facing exclusion from 5G markets and the risk of a ban on Huawei's purchase of US components, there is no shortage of potential crises to occupy his thoughts. (See Huawei Hits Out at DoJ Amid Global Backlash and Huawei Muscle Puts Ericsson, Nokia on 5G Back Foot in Europe ? Sources.)

But CEOs are paid to find answers -- not dwell on problems -- and for Eric Xu the answer appears to be the successor to 5G. "What's in my mind right now is 6G," he told reporters at Huawei's latest press event in Shen...