name: AMBR
full_form: Aggregate maximum bit rate
context: 38.331 [4]. 7.13 Activation and Deactivation of SCG To enable reasonable UE battery consumption while having fast usage of SCG when (NG)EN-DC or NR-DC is configured, an activation/deactivation mechanism of SCG is supported. While the SCG is deactivated, there is no transmission via SCG RLC bearers. Only the NR SCG can be deactivated, and all SCG SCell(s) are in deactivated state while the SCG is deactivated. Upon SCG deactivation and while the SCG is deactivated, the network ensures that there is no uplink control PDU transmission to the deactivated SCG (e.g. the network releases statusReportRequired from PDCP entities of SCG bearers if configured, the network does not perform QoS flow remapping from a DRB associated to the deactivated SCG to another DRB). The network ensures the SCG is activated while PDCP duplication is activated for SCG RLC entities associated with a PDCP entity. NOTE: Upon SCG (de)activation, it is up to the network to ensure there is no pending SDUs or PDUs in
description: The Aggregate Maximum Bit Rate (AMBR) is a parameter that defines the maximum bit rate for a set of bearers or QoS flows in a PDU session. It is used by the Master Node (MN) to control and manage the resources allocated to the Secondary Node (SN) for a specific UE. The MN decides on the Downlink (DL) and Uplink (UL) PDU session AMBR limits and communicates these to the SN, which then applies these limits to the relevant bearers or radio traffic.
explanation: The context describes AMBR as a parameter set by the MN to control resource allocation to the SN. It's explicitly stated that the MN determines AMBR limits for DL and UL PDU sessions and conveys them to the SN for implementation. This clearly indicates AMBR's function as a configurable setting within a telecommunications system, aligning with the definition of a Parameter.
section_title: 8.1	QoS aspects
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