The access stratum (AS) in computer networking and telecommunications is a functional layer in the UMTS and LTE wireless telecom protocol stacks between radio network and user equipment. While the definition of the access stratum is very different between UMTS and LTE, in both cases the access stratum is responsible for transporting data over the wireless connection and managing radio resources. The radio network is also called access network.

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| HTTP | | Application |

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| TCP | | Transport |

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| IP | | Internet |

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| NAS | | Network |

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| AS | | Link |

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| Channels | | Physical |

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See also

Mobility Management

GSM

Communication protocol

Internet protocol suite

X.25 protocol suite

OSI protocol suite

References

Mobile technology

Network protocols

ko:Non Access Stratum

Access stratum