A Interface Data Negotiated for Interconnection (A over IP)

A Interface Data Negotiated for Interconnection

The A interface data negotiated for the connection between the BSC and the MSC is as follows:

• M3UA data

  M3UA data includes the M3UA entities, M3UA link set, and M3UA route. The M3UA data on the BSC side and that on the MSC side must be consistent.

• CGI parameters

  CGI uniquely identifies a cell in the GSM system. CGI consists of the MCC, MNC, LAC, and CI. The settings of these parameters on the BSC side and those on the MSC side must be consistent.

• M3UA link parameters on the A interface

  In A over IP mode, the M3UA link parameters include the Linkset Name, Local Port No., Peer Port No., Local Address 1, Local Address 2, Peer Address 1, Peer Address 2, Send Check Sum Validation Flag, and Check Sum Type. The settings of these parameters must be negotiated on both the BSC side and the MSC side.

• A Interface Tag

  The A interface tags consist of GSM_PHASE_1, GSM_PHASE_2, and GSM_PHASE_2+. The setting of this parameter on the BSC side and that on the MSC side must be consistent.

• Location update period

  The location update period is defined by T3212. The location update period on the MSC side must be longer than that on the BSC side.

• Authentication and ciphering parameters

  The settings of authentication and ciphering parameters on the BSC side and those on the MSC side must be consistent.

• Inter-BSC or Inter-MSC handover parameters

  If inter-BSC or inter-MSC handovers are required, parameters such as CGI, BCCH frequency, NCC, BCC, and Co-MSC must be negotiated on both the BSC side and the MSC side.

Example of A Interface Data Negotiated for Interconnection