| 摘要 |
A method, for use in a mobile communications system (MCS), efficiently generates routing information when a caller of a first electronic switching system (ESS) calls a receiver's phone connected to a second ESS through a base station system, wherein the routing information is used for the first ESS to choose one of a plurality of transit networks (TN's) formed between the ESS's to communicate voice messages and/or data between the caller and the receiver. At a first step, if there is a first demand signal from the first ESS, roaming information representing the location of the receiver is derived, wherein the first demand signal is generated when an identification code, indicating that the receiver is a mobile subscriber, is received by the first ESS from the caller. At a subsequent step, there is selectively generated first TN selection data based on subscriber information which is predetermined by each of the caller and the receiver or second TN selection data which is predetermined by the MCS, wherein each TN selection data denotes one of the TN's. At a final step, the produced first or second TN selection data and the derived roaming information are formatted to thereby gener ate the routing information.
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