Meaning
Communication protocol layer used for exchange between the user equipment and the core network in cellular systems. This nas signalling operates independently of the lower radio layers to manage the mobility and security of the device. Initial registration with the network requires the transmission of specific identification parameters.
Authenticating the device and establishing encryption are the primary functions of this protocol.
Connection Management
Establishment of a dedicated path for data transfer relies on the exchange of control messages. When a mobile device moves between cells, nas signalling coordinates the update of its location in the network database.
Session Control
Activation of specific data services involves the negotiation of quality of service parameters between the device and the gateway. Procedures for nas signalling define how a device requests an internet protocol address. These sessions remain active even as the physical radio link fluctuates.
Operators use these controls to manage the allocation of network resources.
Message Flow
Information transfer between the mobile device and the mobility management entity occurs through encapsulated packets. These packets for nas signalling pass through the base station without being decrypted by the radio access network. Security headers protect the integrity of the registration and authentication requests.
Dedicated timers manage the retransmission of messages if an acknowledgment is not received within a set period. Efficient delivery of these signals minimizes the time required for a device to attach to the network.
