name: UL
full_form: Uplink (mobile to network)
context: enhancements designed for mTRP non-coherent JT and Type-II assuming FDD (angle-delay) reciprocity can be beneficial to support additional deployment scenarios. Enhancements for multi-beam operation In Rel-15/16, UL beam indication utilizes a different framework from DL beam indication. As DL and UL beam indication share similar characteristics, a unified TCI-based framework for DL and UL beam indication is introduced in Rel-17 where UL TCI is used to represent UL spatial relation. Depending on whether DL and UL share the same TCI (e.g. in relation to the beam correspondence assumption supported by the UE), a UE can be configured with either joint DL/UL TCI (where DL and UL share the same TCI state hence a single TCI state update applies to both) or separate DL/UL TCI (which includes the signalling of DL-only, UL-only, and DL+UL TCI state update). Central to the Rel-17 TCI framework is the use of common beam for UE-dedicated PDCCH and the associated PDSCH intended to streamline
description: Uplink (UL) refers to the direction of data transmission from a mobile device (User Equipment, UE) to the network. In the context of 3GPP specifications, UL is an essential concept in understanding how data is transmitted and received between the UE and the network.
explanation: The classification of 'UL' as a Direction entity type is justified by its usage in the provided context, where it specifically refers to the transmission direction from the mobile device to the network. This distinction is crucial in telecommunications, especially when discussing beam indication, spatial relations, and data transmission protocols.
section_title: 11.1	Further enhancements on MIMO for NR
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