| 摘要 |
<p>A data communications method and data signal is presented wherein dynamic time-variable time-division duplexing can be achieved by virtue of control data in the form of a frame descriptor header, providing full a priori knowledge of every subscriber terminal in a cell of the expected contents, sturcture and/or timing of the remainder of the data to be transmitted onto a common channel in both the upstream and downstream direction in the remainder of the frame. The invention has the advantage that channel utilisation efficiency can remain high regardless of the symmetry of the upstream and downstream traffic.</p> |
