it's fairly standard terminology...you've doubled the amount of data that can be sent over a given chunk of spectrum per unit time, without changing the modulation/encoding scheme (bits/hz). A normal full duplex FDD system takes twice the bandwidth to pass the same amount of information as this theoretically can.
Rather than think about bursty, asymmetric Ethernet bits, consider passing something like a fully allocated T1 over it. Symmetric TDM links aren't totally dead, there are a lot of T1 radios out there. What used to take X Hz of bandwidth, theoretically can be done in X/2...without changing the modulation.
I don't think it will actually be used that way, but it is a breakthrough of sorts to be able to do so.
Rather than think about bursty, asymmetric Ethernet bits, consider passing something like a fully allocated T1 over it. Symmetric TDM links aren't totally dead, there are a lot of T1 radios out there. What used to take X Hz of bandwidth, theoretically can be done in X/2...without changing the modulation.
I don't think it will actually be used that way, but it is a breakthrough of sorts to be able to do so.