Lucent Technologies Inc.

Prashant Janardhan Kurdukar

Martine Madelaine Herpers

Christopher Lawrence Fernandez

James E Hoch

Masoor Ramesh

A subscriber dialed common access code, e.g., pqr, such as for directory assistance (411), fire service (611), or voice mail service (222) is translated into a predetermined seven digit number, e.g., tuv-wxyz. All or part of the subscriber's directory number (DN), e.g., abc-defg, is then prefixed and/or suffixed to the translated number to provide a re-constructed number which includes all or part of the subscriber's DN. The re-constructed number takes the form of part/all of &lsqb;abc-defg&rsqb; and tuv-wxyz followed by part/all of &lsqb;abc-defg&rsqb;. Thus, the re-constructed number incorporates all or part of the subscriber's DN allowing for differentiation among various subscribers who use common access codes permitting each subscriber call to be routed on an individual basis. This permits common access codes to be used by subscribers throughout the network, while routing some subscriber calls differently from others where the same dialed digits are used. In another embodiment, all or part of the caller's DN is combined either as a prefix or suffix with the dialed number for the selective routing of calls to the dialed number on an individual caller basis. This latter approach does not make use of a special access code in making the call.

Common access code routing using subscriber directory number

A method and an apparatus for using fuzzy logic to determine when handovers are desirable and the extent to which the radio transmission power in a cellular telephone network should be adjusted. The mobile phone and the base transceiver station measure certain system parameters, including rate of handover, quality, distance, level, call duration, and power. These measurements are input to a fuzzifier. The fuzzifier applies standard fuzzy-set-theory membership functions to the measurements, and the fuzzifier outputs a set of fuzzy variables corresponding to the measurements. The fuzzifier outputs are input to an inference engine. The inference engine contains a set of rules that, when applied to the inference engine inputs, indicate: when a handover should be performed; when a handover should not be performed; and the amount by which, if any, the transmission power should be adjusted.

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Naperville, IL, United States of America

Prashant Janardhan Kurdukar