Apparatus for interfacing mobile switching center(MSC) with base station controller(BSC) of CDMA mobile system

A CDMA mobile system base station controller interface which is disposed between a CDMA mobile switching center and a base station controller, said base station controller interface comprising:

• a local data link interface for providing a communication path which is interfaced with a central data link interface in said mobile switching center through a connection between subsystems in said mobile switching center;
• a time switch for connecting said local data link interface to a trunk interface, a mobile announcement, and a mobile local service interface, to thereby perform a time slot converting function, a .mu./A-law converting function, a A/.mu.-law converting function and a concentrating function in a mobile time switch and local service processor, and thus transmit the subscriber data of the time switched sound and non-sound back to said local data link interface;
• a plurality of trunk interfaces linking said time switch to a transcoding and selecting bank of said base station controller through an E1 mode PCM line and trunk which is connected to said time switch, and to the line and trunk access processor, said trunk interfaces being provided for performing an interfacing function to the base station controller to transmit an alarm signal indicating a defect state of a received PCM signal by supplying a clock signal of 4.096 MHz and a frame clock signal of 8 KHz output from said time switch to a synchronous network frame device in the system;
• said mobile announcement for performing the mobile announcing function connecting said local data link interface and said time switch;
• a mobile local service interface for providing a call processing tone with the mobile subscriber for every paging of each mobile call by connecting said local data link interface and said time switch respectively;
• said mobile time switch and local service processor for for transmitting an initiative function, a periodic look up function, a reoperational function, and looking up of a state result message of said local data link interface, said time switch, said mobile announcement, and said mobile local service interface;
• said line and trunk access processor for transmitting the initiative function, the periodic look up function, the reoperational function and the state look up result message of said PCM line and trunk interface;
• a local subsystem network connected to said local data link interface, said mobile time switch and local service processor, and said line and trunk access processor, and said local subsystem network being connected to a number of the nodes to control the high speed inter-processor communication (IPC) message exchange to perform the high speed message exchange between a number of the diversified processors;
• a high speed network management processor for performing the system bus look up function, the maintenance function, the IPC processing function and an arbitration associated signal outgoing function, said high speed network management processor being connected said local subsystem network;
• an alarm control processor for processing the alarm transmitted through said local subsystem network, being connecting to said local subsystem network;
• and
• an access switching processor for controlling said switch and said mobile time switch and local service processor, said line and trunk access processor, and said alarm control processor, said access switching processor performing management for the state and the accounting data of the subscriber or the line and trunk, and transmitting the message to process a frame call and the call.