【資料名稱】：Mobility Management

【資料作者】：林風(fēng)

【資料日期】：2010

【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡介】：

UMTS is evolved from GPRS by replacing the radio access network.
The UTRAN (UMTS Terrestrial Radio Access Network) consistsof
Node Bs (the 3G term for BTS) and Radio Network Controllers (RNCs)
connected by an ATM network.
The RNC and the Node B serving an MS are called the Serving Radio
Network System (SRNS).
In UMTS, every Node B is connected to an RNC through the Iub
interface.
Every RNC is connected to an SGSN through the IuPS interface, and
to an MSC through theIuCS interface.
An RNC may connect to several RNCs through the Iur interface.
Unlike RNCs in UMTS, the BSCs in GPRS/GSM do not connect to each
other.
The IuCS, IuPS, Iub, and Iur interfaces are implemented on the ATM network