op Virtual Group cell 1 Group cell 2 Group cell 3 Figure 2.2 Generalized distributed cell structure. © 2009 by Taylor & Francis Group, LLC Long Term Evolution: 3GPP LTE Radio and Cellular Technology generalized distributed cell structure and the AE of each generalized distributed cell is fixed. With the movement of the MT, different fixed generalized distributed cells will be selected. Considering the situation in AP2, with the movement of MT4, the AE of the generalized distributed cell that serves the MT4 can also move, corresponding with it. As shown in Figure 2.2, antennas 11, 12, and 13 of AP2 are used for MT4 in time slot 1. With the movement of the MT4, in time slot 2, antennas 12, 13, and 14 will be selected by AP2. The construction of the generalized distributed cell is dynamically changed instead of fixed. This is the slide generalized distributed cell structure. The construction of slide generalized distributed cells may be viewed as the pro- cess of sliding windows. The several cells in one generalized distributed cell could be regarded as in one window and the window could change dynamically in size, shape, and slide speed due to the moving speed and direction of the MT. When the MT moves at relatively rapid speed, the size of the slide window will become larger SO as to keep up with the movement of the mobile and decrease the number of handover times. When the speed of the MT is relatively slow, the size of the slide window will become smaller to reduce the waste of resources. If the MT changes its moving direction, the direction of slide window would change at the same time. As a new handover strategy, slide handover changes adaptively in correspondence with the generalized distributed cell structure. Different MTs may correspond to different generalized distributed cells. Based on the generalized distributed cell architecture, the MIMO technique has many more applications, which indicate the unification of the physical layer and the network architecture. In the case of one antenna in each cell, the