文件名称：典型CDMA网络-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:52:06
cdma
典型CDMA网络 CDMA核心网络 MS BS MSC HLR AC EIR VLR PSTN ISDN MC Um A B C D E H Ai Di MSC F VLR MC SME SME G N M M M Q SCP SCP SSP Ai T1 T8 IP HLR IP ISDN Di T2 T 3 T 5 T 9 A interface is defined as the communication interface between Network Sub-System (NSS) and Base Station Sub-system (BSS). In terms of system function entities, A interface is the interconnection interface between Mobile Switching Center (MSC) and Base Station Controller (BSC) and the physical link is implemented by means of a standard 2.048Mbit/s PCM digital transmission link. This interface transfers such information as mobile station management, base station management, mobility management, connection management, etc. Um interface (air interface) is defined as the communication interface between a mobile station and a Base Transceiver Station (BTS) and used for the interconnection between a mobile station and the fixed parts of a CDMA system. The physical link is implemented by mean of a radio link. This interface transfers such information as radio resource management, mobility management, connection management, etc. B interface is defined as the inner interface between a Visitor Location Register (VLR) and a Mobile Switching Center (MSC) and used for a Mobile Switching Center (MSC) to inquire the VLR of related information of the current location of a Mobile Station (MS) or inform the VLR of related location update information of an MS. C interface is defined as the interface between a Home Visitor Register (HLR) and a A Mobile Switching Center (MSC) and is used to transfer routing and management information. If the HLR is used as the charging center, the MSC where the MS establishing or receiving this call should transfer the charging information the HLR this mobile user currently belong to after a call is completed. Once a call to a mobile user is to be established, the Gateway MSC (GMSC) should inquire the HLR the called user belongs to of the roaming number of the called mobile station. The physical link of C interface is that of D interface. D interface is defined as the interface between the HLR and the VLR and used to exchange the information related to the location of a mobile station and user management. D interface is mainly used to ensure that a mobile station can establish and receive a call within the whole service area. A practical CDMA system architecture generally integrates a VLR in an MSC, and integrates the HLR and the Authentication Center (AC) in the same physical entity. Therefore, the physical link of D interface is implemented by means of a standard 2.048Mbit/s PCM digital transmission link between the MSC and the HLR. Q interface is defined as the interface between the MSC and Short Message Center (MC). When a 133 user sends/receives a short message, the MSC of the caller/called should implement short message signaling interaction with the MC of the caller/called. N interface is defined as the interface between the HLR and the MC. When a 133 user receives a short message, the MC of the called should inquire the HLR the called belongs to of the user location so as to obtain the address information of the MSC where the called user is located. M interface is defined as the interface between the MC and the Short Message Entity (SME) or the one between the caller/called MC. A short message is sent from the caller MC to the called MC. N interface is defined as the interface between the HLR and the MC. When a 133 user receives a short message, the called MC inquires the HLR where the called is located of the user location so as to the address information of MSC where the called is located. Then, the called MC fetches the address information of the called 133 user from the called HLR. Ai interface and Di interface are respectively the one with a Public Switched Telephone Network (PSTN) and the one with Integrated Service Digital Network (ISDN). T1 interface: the interface between the Service Control Point (SCP) and Service Switching Point (MSC/SSP). T2 interface: the interface between the SCP and the HLR.