大会官方网站与资料下载地址： www. a r c hs ummi t . c om 感谢您参加本次Ar c h S u mmi t 全球架构师峰会！ 移动通信网络设备的 高可用性平台设计 李程远 纲要 移动网络结构与网元设备 高可用性在移动网络设备中的含义 高可用性平台的设计 n 系统冗余备份模型 n 内部消息的冗余机制 n 网络与传输 n 存储系统 n 过载保护与残留资源的清理 n 系统升级 移动网络结构与网元设备 移动网络结构 3G RAN Iu-CS Mc Iu-PS Ater ATM/IP backbone Iub BTS Nb Mb Mg Mc Mc 2G BSS Abis PSTN CN Gn CS-CN PS-CN Iur RNS BTS SGSN A Ater TC BSC Gm Nc RAN PSTN MSS/ GCS CPS GGSN MSC Server BTS BTS BSS RNC RNC MGW MGW MGW 3GPP 用户平面与控制平面的协议栈 Application Data Link IP SCTPUDP Iub FPNBAP Transport Network Layer Iub Iub User PlaneIub Control Plane Data Link IP SCTPUDP Iur FPRNSAP Transport Network Layer Iur Iur User PlaneIur Control Plane M3UA SCCP Data Link IP SCTPUDP Iu UPRANAP Transport Network Layer Iu Iu User PlaneIu Control Plane M3UA SCCP GTP RTP/ RTCP 相关术语解释 n NE (Network Element, 网元网元) According to Telecommunications Act of 1996, the term network element means a facility or equipment used in the provision of a telecommunications service. Such term also includes features, functions, and capabilities that are provided by means of such facility or equipment, including subscriber numbers, databases, signaling systems, and information sufficient for billing and collection or used in the transmission, routing, or other provision of a telecommunications service. n UE (User Equipment，用户设备用户设备) UE is any device used directly by an end-user to communicate. It can be a hand-held telephone, a laptop computer equipped with a mobile broadband adapter, or any other device n RAN (Radio Access Network， 无线接入网无线接入网） Conceptually, it resides between a device such as a mobile phone, a computer, or any remotely controlled machine and provides connection with its core network (CN). RAN types: GRAN (GSM RAN), UTRAN (UMTS RAN). n CN (Core Network, 核心网核心网) It is the central part of a telecommunication network that provides various services to customers who are connected by the access network. One of the main functions is to route telephone calls across the PSTN. 相关术语解释 n Interfaces n Uu, The radio interface between the UE and the BTS. n Iub, The interface between BTS and RNC. n Iu, The interface connects RAN and CN n Iu-CS, Iu interface Circuit Switched n Iu-PS, Iu interface Packet Switched n Iur, The interface between RNCs, for soft handover. n User Plane (用户平面) All information sent and received by the user, such as the coded voice in a voice call or the packets in an Internet connection, are transported via the User Plane. n Control Plane (控制平面) Its for all control signalling, includes the application protocol (e.g. RANAP in Iu, RNSAP in Iur and NBAP in Iub), and the signalling bearer for transporting the application protocol messages. n Management Plane (管理平面) The management plane carries the operations and administration traffic required for network management. Network Element 1800 (2200) 600 600 Cabinet / rack Subrack Plug-in unit Advanced Telecom Computing Architecture http:/www.picmg.org/v2internal/newinitiative.htm Rack-mount Box 一个网元中不同的功能模块 Tran Unit Inter-processor switch . Inter-processor switch . Inter-processor switch MU SPU UserPlane Unit . SPU . Inter-processor switch MU SPU . SPU . IubIubIuIu Tran Unit CCU Tran Unit Tran Unit UserPlane Unit UserPlane Unit UserPlane Unit UserPlane Unit UserPlane Unit CCU UserPlane Unit UserPlane Unit IP/IPSec UDP GTPRTP SCTP M3UA SCCP IPC IP/IPSec UDP SCTP IPC IPC IPC RANAPNBAP FP MAC RLC RRC IU UP IuIub Tran Unit (Linux Node + HW Accelerate)Tran Unit (Linux Node + HW Accelerate) SPU (Linux Node) UPU (DSP or SE Node) User Plane Traffic Signaling Traffic 高可用性在移动网络设备中的含义 五个九的要求 n MTTF/MTBF = MTTF/(MTTF + MTTR) = 99.999% 一年中停机时间最多5分15秒 不同服务的可用性 n 用户平面 n 控制平面 n 管理平面 高可用性平台的设计 系统冗余备份模型 Cluster Node Service Unit Process Proxied Component Service Group 1 1* 1 1* 1 1* 1* 1 1 1* 1 0* 1 0* 系统冗余备份模型 n SG(Service Group) Redundance Model n 2N n Active/Hot Standby. n N+M n Active/Cold Standby n N-Way Active n Active, Loadsharing n No Redundancy n State Model (ITU-T X.731) n Administrative State n Locked/Unlocked/ Shutting Down. n Operational State n Enable/Disable n Usage State n Idle/Active/Busy 系统冗余备份模型 Process0 2N Service Group Service Unit 0 Service Unit 1 (Active) Node_0 Disk Resource IP Node_1 Process1 Process1 Process0 Disk Resource Process0 2N Service Group Service Unit 0 (Active) Service Unit 1 (Hot Standby) Node_0 Disk Resource IP Node_1 Process1 Process1 Process0 Disk Resource 2N Service Group 系统冗余备份模型 Process0 Service Unit 1 (Active) Service Unit 3 (Cold Standby) Node_1 Node_3 Process1 Process1 Process0 Process0 Service Unit 0 (Active) Node_0 Process1 Process0 Service Unit 2 (Active) Node_2 Process1 Service Unit 4 (Cold Standby) Node_4 Process1 Process0 N+M Service Group N+M Service Group 系统冗余备份模型 Process0 Service Unit 1 (Active) Service Unit 3 (Active) Node_1 Node_3 Process1 Process1 Process0 Process0 Service Unit 0 (Active) Node_0 Process1 Process0 Service Unit 2 (Active) Node_2 Process1 Service Unit 4 (Active) Node_4 Pro