name: AAL2
full_form: ATM Adaptation Layer type 2
context: Figure 8.2.2-1: HNB Register Procedure: Successful Operation The HNB shall initiate this procedure by sending a HNB REGISTER REQUEST message whenever it needs to commence operations and requiring service from the HNB-GW. If the HNB is CSG capable and operates in a Closed access mode as defined in TS 22.220 [15], then it shall provide the CSG-ID IE and may provide the HNB Cell Access Mode IE within the HNB REGISTER REQUEST message. If the HNB is supporting PWS it shall provide the Service Area For Broadcast IE within the HNB REGISTER REQUEST message. If the HNB operates in a Hybrid access mode as defined in TS 22.220 [15], then it shall provide the CSG-ID IE and HNB Cell Access Mode IE within the HNB REGISTER REQUEST message. If the HNB operates in an Open access mode as defined in TS 22.220 [15], then it shall provide the HNB Cell Access Mode IE within the HNB REGISTER REQUEST message. If the HNB supports direct Iurh connectivity it shall provide the Iurh signalling TNL Address IE to
description: The ATM Adaptation Layer type 2 (AAL2) is a protocol used for transmitting user data over Asynchronous Transfer Mode (ATM) connections. It plays a crucial role in managing the performance of AAL2 traffic by distributing it across multiple Virtual Channels (VCs), which affects the load on each ATM connection and consequently impacts parameters such as cell delay variation (CDV) and cell transfer delay (CTD).
explanation: AAL2 is classified as a Protocol because the context describes its role in adapting user data for transmission over ATM connections, highlighting its impact on performance metrics like delay and jitter. The description of how AAL2 traffic distribution affects ATM connection load and performance indicators further solidifies its classification as a protocol.
section_title: 5.3.2	Multiplexing and De-multiplexing Delay (TN1)
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