This describes the A interface data negotiated and planned for the connection between the BSC and the MSC and provides the examples of the data configuration.
The A interface data negotiated for the connection between the BSC and the MSC is as follows:
Signaling point code parameters
Signaling point code parameters are the OPC, DPC, coding scheme, and network indicator. The settings of these parameters on the BSC side must be consistent with those on the MSC side
CGI parameters
CGI uniquely identifies a cell in the GSM system. CGI parameters 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.
Parameters for signaling links on the A interface
Parameters for signaling links on A interface consist of the number of A interface signaling links, SLC, SLC Send, link timeslot, and the CIC range of each signaling link. The settings of these parameters on the BSC side and those on the MSC side must be consistent. The cable connections must be correct.
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.
Speech version parameters
The speech version on the BSC side can be set to full rate version 1, full rate version 2, or half rate version 1. The setting of this parameter on the MSC side must be consistent with that on the BSC side.
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.
Optical interface board attributes
Optical interface board attributes are Tributary Numbering, TX J0 Byte, Expect RX J0 Byte, TX J1 Byte, Expect RX J1 Byte, TX J2 Byte, Expect RX J2 Byte, TX Frame Format, and RX Frame Format. The settings of these parameters on the BSC side and those on the MSC side must be consistent.
Parameter |
Parameter to Be Configured |
Example |
Source |
|---|---|---|---|
OPC |
OPC Name |
BSC001 |
Internal BSC planning |
OPC (Hex) |
B1 |
Network planning |
|
Network Indicator |
NATB |
Network planning |
|
DPC |
DPC Name |
MSC001 |
BSC internal planning |
DPC(Hex) |
D1 |
Network planning |
Parameter |
Parameter to Be Configured |
Example |
Source |
|---|---|---|---|
Basic Attribute Parameters |
MCC |
460 |
Network planning |
MNC |
01 |
Network planning |
|
LAC |
8240 |
Network planning |
|
CI |
1 |
Network planning |
Parameter |
Parameter to Be Configured |
Example |
Source |
|---|---|---|---|
SS7 Link |
SLC |
1 |
Negotiation with the peer |
SLC Send |
1 |
Negotiation with the peer |
|
TS |
TS16 |
Negotiation with the peer |
|
CIC range |
0-65535 |
Negotiation with the peer |
|
Rate Type |
64 kbit/s |
Negotiation with the peer |
|
Basic Data |
A Interface Tag |
GSM_PHASE_2+ |
Network planning |
Parameter |
Parameter to Be Configured |
Example |
Source |
|---|---|---|---|
SubBoard Attribute |
Tributary Numbering |
HuaWei mode |
Negotiation with the peer |
TX J0 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
|
Expect RX J0 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
|
TX J1 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
|
Expect RX J1 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
|
Attributes of the Ports on the OIUa Board |
TX J2 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
Expect RX J2 Byte |
MGW SDH DEFAULT (character string) |
Negotiation with the peer |
|
TX Frame Format |
DOUBLE_FRAME |
Negotiation with the peer |
|
RX Frame Format |
DOUBLE_FRAME |
Negotiation with the peer |