| 摘要 |
The Radio Resource Management (RRM) operates in a cellular network either of the 2<nd> or 3<rd> generation in order to bias TDMA traffic towards prefixed directions of sectored cells. The network is built up by replicating a network base element over a wide synchronised area. The base element includes one or more sectored cells either disjoint or superimposed to each other. The base stations exploit directive antennas able to cut out the gain for sectoring the cells and measuring the directions of arrival (DOA) of the users signals. The RRM plans the transmissions of the mobiles and the serving BTSs by allocating the available timeslots to sectors which don't overlap, as far as possible, the sectors of adjacent or superimposed cells during a same active timeslot. The last is also allocated to the users whose DOAs best match with the angular positions of the relevant sectors. A suitable configuration table is generated by mapping a subset of the possible allocations between cell/s, sectors, and timeslots. Starting from the selection of an initial configuration in the table, suitable spatial functions are generated to define the configurations of all the adjacent elements, in order to achieve maximum interference rejection. The relationships respect topological properties so that it can be repeated periodically in space (fig.18). <IMAGE>
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