Combined base transceiver station and base station controller handoff

Abstract

A system, method, and computer readable medium for a softer handoff comprises receiving a Pilot Strength Measurement Message (PSMM) to request a handoff by a selector distribution unit (SDU), receiving a softer handoff request message by a channel element control (CEC), receiving a softer handoff request message by a radio call control (RCC), receiving a traffic channel assignment message by the CEC, and receiving an indication of an addition of a new sector for the softer handoff by the SDU.

1 . A method, comprising:
 receiving a soft handoff request message by a radio call control (RCC) from a main call control (MCC), wherein the MCC interfaces with the RCC to request a radio resource and wherein the MCC interfaces with a selector distribution unit (SDU) to allocate a selector resource;   receiving a message indicating the soft handoff by a channel element control (CEC) from the SDU; and   controlling, by a master main control processor, a plurality of radio access networks, wherein the radio access networks include the RCC, MCC, SDU and CEC.   
     
     
         2 . The method of  claim 1  comprising updating a handoff state by the RCC. 
     
     
         3 . The method of  claim 2  comprising receiving a handoff completion message by the CEC. 
     
     
         4 . The method of  claim 3  comprising receiving a Pilot Strength Measurement Message (PSMM) by the SDU to request a handoff by the SDU. 
     
     
         5 . The method of  claim 4  comprising sending a message by the SDU to drop a serving cell. 
     
     
         6 . The method of  claim 5  comprising receiving a handoff completion message by the CEC. 
     
     
         7 . The method of  claim 6  comprising receiving a soft handoff request message by the CEC. 
     
     
         8 . The method of  claim 7  comprising receiving a handoff completion message by the SDU. 
     
     
         9 . The method of  claim 8 , wherein the handoff completion message is received by the CEC from a mobile station after the mobile station receives an Extended/General/Universal Handoff Direction message from the SDU. 
     
     
         10 . The method of  claim 1  comprising determining by the SDU that the soft handoff should occur. 
     
     
         11 . The method of  claim 10  comprising initiating a message by the SDU to the MCC that the soft handoff should occur. 
     
     
         12 . A method, comprising:
 receiving a soft handoff request message by a selector distribution unit (SDU) channel element control (CEC) processor (SCP), wherein:
 the SCP comprises an SDU and a CEC and a main control processor (MCP), 
 the MCP includes a radio call control (RCC) and a main call control (MCC), requesting, by the MCC, a radio resource; 
   allocating, by the SDU a selector resource; and   controlling, by a master main control processor, a plurality of radio access networks, wherein the radio access networks include the RCC, MCC, SDU and CEC.   
     
     
         13 . The method of  claim 12 , comprising relaying via a Packet Control Function (PCF) call processing functionality between the SDU and the MCC to provide internal signaling and packet delivery. 
     
     
         14 . The method of  claim 12 , comprising receiving a traffic channel assignment message by the SCP. 
     
     
         15 . The method of  claim 12 , comprising receiving an indication of an addition of a new sector for the soft handoff by the MCP. 
     
     
         16 . A system, comprising:
 a main call control (MCC) configured to receive a soft handoff request message;   a channel element control (CEC) configured to receive an indication of an addition of a new sector for the soft handoff;   a selector distribution unit (SDU) configured to determine the soft handoff; and   a master main control processor (MCP) configured to control a plurality of radio access networks, wherein the radio access networks include the MCC, SDU and CEC.   
     
     
         17 . The system of  claim 16 , comprising a Packet Control Function (PCF) configured to relay call processing functionality between the SDU and the MCC to provide internal signaling and packet delivery. 
     
     
         18 . The system of  claim 16 , wherein the CEC is configured to receive a traffic channel assignment message. 
     
     
         19 . The system of  claim 16 , wherein the MCC interfaces with the RCC to request a radio resource. 
     
     
         20 . The system of  claim 16 , wherein the MCC interfaces with the SDU to allocate a selector resource.