초록 ▼

Four stages of digital cellular architecture are presented which reuse much of the existing voice infrastructure while allowing graceful introduction of data and integrated voice/data services over industry standard, low cost platforms. First, a separate ATM-based infrastructure is introduced that s

Four stages of digital cellular architecture are presented which reuse much of the existing voice infrastructure while allowing graceful introduction of data and integrated voice/data services over industry standard, low cost platforms. First, a separate ATM-based infrastructure is introduced that supports data services. A new data call control is introduced on industry standard hardware platforms using object oriented and modular programming. Second, ATM is introduced at radio ports and call control functions are migrated to the new ATM-based call control platforms. Third, vocoders are introduced at the DCS. Fourth, the cellular functions of the legacy cellular switch are phased out and replaced by the ATM-based target architecture.

대표청구항 ▼

[ We claim:] [1.] A method for introducing data and integrated voice/data services to a legacy digital cellular network having a plurality of base stations that communicate over an air interface with a plurality of terminal devices, a cellular switch having circuit-switching fabric in communication

[ We claim:] [1.] A method for introducing data and integrated voice/data services to a legacy digital cellular network having a plurality of base stations that communicate over an air interface with a plurality of terminal devices, a cellular switch having circuit-switching fabric in communication with a public switched telephone network (PSTN) and said base stations, where said cellular switch includes vocoders for voice calls, and a cellular call control processor that handles voice calls routed through said cellular switch, comprising the steps of:deploying a data digital cellular switch (DCS) having ATM switching fabric and a radio link protocol processor, and deploying an associated data call control processor for handling data calls routed through said data DCS and said cellular switch;deploying a plurality of radio ports having ATM interfaces, and deploying one or more standard hardware platforms implementing ATM transport that perform a plurality of call control functions including the handling of data calls from/to said base stations and radio ports, where data calls involving said radio ports are not routed through said cellular switch; anddeploying vocoders in said data DCS for processing voice calls involving said radio ports.