HUAWEI BSC6000 Base Station Subsystem Signaling Analysis Guide
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1 BSS Signaling Fundamental
BSS Signaling Fundamental
About This Chapter The external BSS interfaces, which are the Um interface between the BSS and the MS, and the A interface between the BSS and the MSC, are standard interfaces. The Abis interface between the BSC and the BTS is an internal interface. 1.1 A Interface This topic describes the A interface protocol model that consists of the physical layer, MTP layer, SCCP layer, and BSSAP layer. 1.2 Abis Interface The Abis interface lies between the BTS and the BSC. It complies with GSM Rec.08.5X series. The Abis interface is an internal interface of the BSS. The interworking between the BSC and BTS equipment from different manufactures is not available. The terrestrial traffic channels on the Abis interface map the radio traffic channels on the Um interface. 1.3 Um Interface The Um interface lies between an MS and the BTS. It is used for the interworking between the MS and the fixed part of the GSM system. The links on the Um interface are radio links. The Um interface transmits the information about radio resource management, mobility management, and connection management.
Issue 01 (2007-09-05)
Huawei Technologies Proprietary
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