A general methodology based on the handover rate for networkplanning of cellular radio networks based on ATM

摘要

Mobile radio networks based on ATM (asynchronous transfer mode)ntechnology, such as wireless ATM, are considered. More precisely, thentopology of connections between the ATM nodes and the base stations isninvestigated, taking the limited capacity of ATM nodes into account.nThis requires the partitioning of cells, that is, the set of cells hasnto be subdivided into subsets so that base stations of cells belongingnto the same subset are connected to the same ATM switch. Among thenpossible partitions, the optimum solution is that giving the minimumnnumber of handovers requiring a change of ATM switch: in this case, anpath rerouting procedure must be carried out, causing additional delaysnin executing the handover. The optimum partition could be found bynexhaustively considering all possibilities once the handover ratesnbetween cells is known; however, this would lead to an incrediblencomplexity for the planning of large networks. We define a generalnmethodology based on the concept, of “handover rate” betweenncells, which allows the choice of the best partition by taking mobility,nradio, and fixed network aspects into account. Moreover, some newnlow-complexity partitioning algorithms determining suboptimum solutionsnare proposed. Finally, we show that the suboptimum partition slightlyndepends on some radio interface choices, such as the handover algorithm,nthus allowing separate design of the two aspects