The S1 signalling link management function provides a reliable transfer of the radio network signalling between E-UTRAN and EPC.

S1信令连接管理功能提供E - U TRAN和EPC之间的无线网络信令的可靠传输。

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The E-UTRAN architecture, i. e. the E-UTRAN logical nodes and interfaces between them, are defined as part of the Radio Network Layer.

E-UTRAN结构，也就是指E-UTRAN的逻辑节点和节点之间的接口，作为无线网络层的一部分被定义。

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The purpose of the integrity check is to make sure that the signalling continues between the same elements as by authentication. The integrity check shall be done within the E-UTRAN.

完整性检查的目的是保证信令是在通过鉴权的相同的网元间继续，完整性检查将在E-UTRAN中完成。

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