INCREASING GSM NETWORK QUALITY OF SERVICE USING A SECOND ASSIGNMENT ATTEMPT TO ALTERNATIVE CARRIER
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-Jun-04
During a standard GSM call setup process, a speech call is assigned from a SDCCH (signalling channel) to a TCH (traffic channel). If the TCH selected suffers from interference, then the assign- ment will fail. The call will then re-establish back on the SDCCH, and an Assignment Failure message will be sent to the MSC. The MSC will then typically release the call, causing the subscriber to experience a failed call setup.