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Iu/A-Flex技术是在3GPP R5版本中正式提出的一种新的组网机制,其核心是一个无线接入网(RAN)可接入多个核心网(CN)节点,并引入Pool的概念。Iu/A-Flex功能的引入可以实现核心网节点间的负载均衡,提高设备利用率;减少跨局切换信令、降低网络信令负荷、提高网络性能;提供自动容灾机制;方便网络运行维护。这里对基于Iu/A-Flex的POOL原理进行和关键技术进行了分析,并针对在移动核心网现网中引入POOL技术进行探讨。
Iu / A-Flex technology is a new networking mechanism formally proposed in the 3GPP R5 release. The core of the Iu / A-Flex technology is that a radio access network (RAN) can access multiple core network (CN) nodes and introduce into a pool concept. The introduction of Iu / A-Flex function can achieve load balancing among core network nodes and improve equipment utilization; reduce inter-office handover signaling, reduce network signaling load and improve network performance; provide automatic disaster recovery mechanism; and facilitate network operation and maintenance . The key technologies of POOL based on Iu / A-Flex and its key technologies are analyzed here, and the POOL technology introduced in the mobile core network is discussed.