name: LLC
full_form: Logical Link Control
context: if no logical link has been already established for that SAPI. If the LLC SAPI indicated by the network can not be supported by the MS, the MS shall initiate the PDP context deactivation procedure. In Iu mode, both SGSN and MS shall store the LLC SAPI and the radio priority in the PDP context. If an Iu mode to A/Gb mode Routing Area Update is performed, the new SGSN shall initiate establishment of the logical link using the negotiated LLC SAPI, the negotiated QoS profile and selected radio priority level stored in the PDP context as in an A/Gb mode to A/Gb mode Routing Area Update. An MS, which is capable of operating in both A/Gb mode and Iu mode, shall use a valid LLC SAPI, while an MS which is capable of operating only in Iu mode shall indicate the LLC SAPI value as "LLC SAPI not assigned" in order to avoid unnecessary value range checking and any other possible confusion in the network. When the MS uses a valid LLC SAPI, the network shall return a valid LLC SAPI. The network shall
description: Logical Link Control (LLC) is a protocol used for managing logical links between network elements in mobile networks. It plays a crucial role in establishing and maintaining connections, especially during the activation, deactivation, and re-activation of PDP contexts.
explanation: The text explicitly states that LLC is a 'protocol' used for managing logical links in mobile networks. This definition aligns with the standard understanding of a protocol as a set of rules governing communication between entities.
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