ALERTING OF A TARGET USER DURING CALL SET-UP
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jun-28
In existing IDEN (and GSM) systems, when the originating mobile (OM) or Land unit places an interconnect call to a target mobile (TM), the infra- structure (ACG) allocates to a TM radio traffic channel (TCH) first and then attempts to allocate terrestrial resources such as voice processors, full- rate and subrate terrestrial voice channels and other BSC and XCDR resources. Upon receiving a TCH, the target mobile, according to current algorithm, sends Alerting message to infrastructure and begins to alert the target's user (usually by a ringing sound) regardless whether or not the further resources allo- cation is successful.