Abstract: The antenna includes a main body, a first elastic film, a first medium, a curvature adjustment unit and at least one antenna unit. The first elastic film is adhered to the main body, and the first elastic film and the main body are encircled to form a first volume variable cavity. The first medium is filled in the first volume variable cavity, the first elastic film is elastically deformable according to a volume or pressure change of the first medium; the curvature adjustment unit is configured to adjust a curvature of the first elastic film through the volume or pressure change of the first medium; and the at least one antenna unit is adhered to an outer surface of the first elastic film and configured to receive or send a wireless signal. The beam direction of the antenna may be very flexibly changed in a large range.

Abstract: A hybrid time-division multiplexing comprises: S1, determining a length of a single time cycle; S2, formulating a working state table corresponding to the length of the single time cycle; S3, dividing the single time cycle into a synchronous time-division multiplexing time section and/or a statistical time-division multiplexing time section with a ratio of the synchronous time-division multiplexing time section to the single time cycle no less than 0 and no greater than 1; and S4, according to the working state table, accessing the channel and transmitting information by the MAC protocol user adopting synchronous time-division multiplexing in the synchronous time-division multiplexing time section, and/or accessing the channel and transmitting information by the MAC protocol user adopting statistical time-division multiplexing in the statistical time-division multiplexing time section.