as transmitted by the terminal device (user equipment). For the beginning of the uplink subframe to arrive at the base station at time T2, transmission by the terminal device starts at a time T2-Δp (it is assumed here the uplink propagation delay is the same as the downlink propagation delay).
As can be seen in FIG. 4, the downlink and uplink propagation delays mean that the end of the downlink subframe as seen by the terminal device is after the beginning of the uplink subframe as transmitted by the terminal device. Thus the terminal device sees an overlap of twice the propagation delay between the end of the downlink subframe (UE:DL) and the beginning of the uplink subframe (UE:UL). In a half-duplex mode of operation the terminal device cannotGreenfinches are the largest and most stockily built of New Zealand’s introduced finches. A heavy bill allows the bird to crack larger seeds than other species can manage. They were introduced from Britain by Acclimatisation Societies between 1862 and 1868, and are now common throughout much of the mainland. Greenfinches feed mostly on seeds, including those from a number of crops; therefore they are regarded as a pest in some districts. Large flocks are frequent outside the breeding season, often mixed with other species of finches.

Identification

Greenfinches are similar in size to, but more thickset than a house sparrow. They are sexually dimorphic; males are green, varying in intensity, with some yellow on the abdomen. There are bright yellow bars on the leading edges of the wings. The female,