【資料名稱】：4G核心網(wǎng)LTE信令流程-23401-850

【資料作者】：3gpp

【資料日期】：2009-03

【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡介】：

Contents
Foreword............................................................................................................................................................8
1 Scope........................................................................................................................................................9
2 References................................................................................................................................................9
3 Definitions and abbreviations.................................................................................................................11
3.1 Definitions.......................................................................................................................................................11
3.2 Abbreviations...................................................................................................................................................11
4 Architecture model and concepts...........................................................................................................13
4.1 General concepts..............................................................................................................................................13
4.2 Architecture reference model...........................................................................................................................13
4.2.1 Non-roaming architecture..........................................................................................................................13
4.2.2 Roaming architecture.................................................................................................................................14
4.2.3 Reference points.........................................................................................................................................16
4.2.4 Warning System architecture.....................................................................................................................17
4.3 High level functions.........................................................................................................................................17
4.3.1 General.......................................................................................................................................................17
4.3.2 Network access control functions...............................................................................................................18
4.3.2.1 General.................................................................................................................................................18
4.3.2.2 Network/Access network selection.......................................................................................................18
4.3.2.3 Authentication and authorisation function............................................................................................18
4.3.2.4 Admission control function..................................................................................................................18
4.3.2.5 Policy and Charging Enforcement Function.........................................................................................18
4.3.2.6 Lawful Interception..............................................................................................................................18
4.3.3 Packet routeing and transfer functions.......................................................................................................18
4.3.3.1 General.................................................................................................................................................18
4.3.3.2 IP header compression function............................................................................................................18
4.3.3.3 Packet screening function.....................................................................................................................19
4.3.4 Security functions.......................................................................................................................................19
4.3.4.1 Ciphering function................................................................................................................................19
4.3.4.2 Integrity protection function.................................................................................................................19
4.3.5 Mobility management functions.................................................................................................................19
4.3.5.1 General.................................................................................................................................................19
4.3.5.2 Reachability Management for UE in ECM-IDLE state........................................................................19
4.3.5.3 Tracking Area list management............................................................................................................20
4.3.5.4 Inter-eNodeB mobility anchor function................................................................................................20
4.3.5.5 Inter-3GPP mobility anchor function...................................................................................................20
4.3.5.6 Idle mode signalling reduction function...............................................................................................20
4.3.5.7 Mobility Restrictions............................................................................................................................21
4.3.6 Radio Resource Management functions.....................................................................................................22
4.3.7 Network management functions.................................................................................................................22
4.3.7.1 General.................................................................................................................................................22
4.3.7.2 Load balancing between MMEs...........................................................................................................22
4.3.7.3 Load re-balancing between MMEs.......................................................................................................22
4.3.7.4 MME control of overload.....................................................................................................................23
4.3.8 Selection functions.....................................................................................................................................24
4.3.8.1 PDN GW selection function (3GPP accesses)......................................................................................24
4.3.8.2 Serving GW selection function.............................................................................................................25
4.3.8.3 MME selection function.......................................................................................................................25
4.3.8.4 SGSN selection function......................................................................................................................25
4.3.8.5 Selection of PCRF................................................................................................................................26
4.3.9 IP network related functions......................................................................................................................26
4.3.9.1 Domain Name Service function............................................................................................................26
4.3.9.2 DHCP function.....................................................................................................................................26
4.3.10 Functionality for Connection of eNodeBs to Multiple MMEs...................................................................26
4.3.11 E-UTRAN Sharing Function......................................................................................................................26
4.4 Network elements............................................................................................................................................27