The access stratum (AS) is a functional layer in the UMTS wireless telecom protocol stack between radio network and user equipment.^[1] The radio network is also called access network.

+- - - - - -+       +- - - - - - -+ | HTTP      |       | Application | +- - - - - -+       +- - - - - - -+ | TCP       |       | Transport   | +- - - - - -+       +- - - - - - -+ | IP        |       | Internet    | +- - - - - -+       +- - - - - - -+ | NAS       |       | Network     | +- - - - - -+       +- - - - - - -+ |     AS    |       | Link        | +- - - - - -+       +- - - - - - -+ | Channels  |       | Physical    | +- - - - - -+       +- - - - - - -+  

See also

• Mobility Management
• GSM
• Network protocol design principles
• Internet protocol suite
• X.25 protocol suite
• OSI protocol suite
• Solution stack

References

1. ↑