the uplink sub frames and the downlink sub frames of the subsidiary communication standard conform to the subsidiary communication standard in this exemplary embodiment the lte standard is defined as the reference communication standard and the ieee 802 16e standard is defined as the subsidiary communication standard the frame structures of the ieee 802 16e standard can be categorized into a combination of a big ttg and a big rtg or a combination of a big ttg and a small rtg wherein the big ttg denotes that the duration of the interval from the uplink sub frames to the downlink sub frames of the ieee 802 16e standard is equal to or greater than the duration of a sub frame of the lte standard and the big rtg denotes that the duration of the interval from the downlink sub frames to the uplink sub frames of the ieee 802 16e standard is equal to or greater than the duration of a sub frame of the lte standard while the small rtg denotes that the duration of the interval from the downlink sub frames to the uplink sub frames of the ieee 802 16e standard is less than the duration of a sub frame of the lte standard the frame structure of the ieee 802 16e standard shown in the lower part of fig4 is a combination of a big ttg and a small rtg the frame structure of the lte standard comprises ten sub frames and could be divided into a first half frame and a second half frame wherein each half frame comprises five sub frames the number of the blank sub frames is denoted as n and the number of the non blank sub frames is denoted as 5 n moreover n.