Layer iii message layer iii is the gsm signaling protocol, which is divided into 3 sublayers. The universal mobile telecommunications system umts is a third generation mobile cellular. Umts long term evolution lte technology introduction. Layer 3 procedures rrc setup and rrc release measurement reports active set update radio bearer setup and reconfiguration transport channel reconfiguration physical channel reconfiguration all call setup and tear down messages such as pdp activationdeactivation, alertingrelease etc these are call control and session management messages. Nonaccess stratum nas is a functional layer in the umts and lte wireless telecom protocol. Each multiframe num gives a cyclic value called tc. Umts layer 3 umts air interface informa telecoms umts layer 3 umts layer 3 1 radio resource control 1. Utran functions, examples on signalling procedures 3gpp. The rrc layer in umts is significantly different than the structure of layer3 in other systems such as. Radio resource management to control the setup, maintenance, and termination of radio and fixed channels, including handovers.
Ls on uplink core network layer 3 message numbering 3gpp. The radio resource control rrc protocol is used in umts and lte on the air interface. The cross reference between gsm, umts, 3gpp and etsi identities can be found. This book is printed on acidfree paper responsibly manufactured from sustainable forestry in which. Services provided by signalling layer 3 at the ms side.
Radio link control protocol 3 levels of service transparent mode no segmentation and reassembly of rlc sdus no rlc headers are added no delivery guarantees limited to system information, paging messages, and the exchange of rrc connection establishment messages associated with ccch unacknowledged mode segmentation of rlc. Easy way to system information layer 3 messages telebeans solutions. A further description of nas is that it is a protocol for messages passed between the user equipment. Transmission cycle between 0 and 7 in order to rule the sending of each sys info message. It is a layer that exists between ue and enb and exists at the ip level layer 3network layer. Pdf umts universal mobile telecommunication service is one of 3g third. Signaling messages are sent on signaling radio bearers srbs and data. Managing smartphones signalling load in umts networks arxiv. It is used on the go interface between the ggsn and the packet data function pdf. The network layer osi 3 includes the radio resource management. In general, signaling messages are needed to regulate the ue. Higher layer signalling messages are encapsulated within rrc.
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