name: L1
full_form: Layer 1
context: view what it the best L1 BLER target in their live networks, and this may depend on many parameters, such as fading type, UE speed and so on. However, some basic field measurements in different live networks indicate that this L1 BLER is somewhere between 15 % and 40% in fading multipath scenarios. Also âFollow CQIâ method used in Data Throughput Performance Testers is such that L1 re-transmission ratio (or BLER) is between 15 to 40% in various test points covering different noise conditions and fading profiles. However 3GPP compliant and GCF certified UE has been tested in so many higher layer tests (TS 34.123-1 [5]) that higher layer re-transmissions occur rather infrequently in real live networks. Since also mandatory field tests are part of GCF certification, the GCF certified UEs higher layer re-transmissions occur significantly less often than L1 re-transmissions in multipath fading scenarios. Comparison of L1 packet re-transmission ratio to higher layer packet re-transmission
description: L1, or Layer 1, refers to the physical layer of the OSI model in telecommunications. It is responsible for transmitting raw bits over a physical link. In the context provided, L1's performance in live networks is discussed, specifically focusing on the L1 BLER (Block Error Rate) target and its implications on data throughput tests.
explanation: The classification of L1 as a 'Layer' entity type is based on the context discussing it within the framework of OSI layers and its role in physical transmission. The mention of 'L1 BLER', 'L1 re-transmission ratio', and comparison with higher layer re-transmissions further solidifies this categorization, indicating that L1 is being referred to as a specific layer within the telecommunications architecture.
section_title: 5.8.2	Modem Performance in Application Layer Data Throughput Tests
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