name: DU
full_form: Data Unit
context: The channel-coded, interleaved, and data-modulated information [Layer 3 information] is mapped onto SC-FDMA time/frequency symbols. The overall SC-FDMA time/frequency resource symbols can be organized into a number of resource units (RU). Each RU consists of a number (M) of consecutive or non-consecutive sub-carriers during the N long blocks within one sub-frame (See section 9.1.1). To support the localized and distributed transmission (See section 9.1.1), two types of RUs are defined as follows: Localized RU (LRU), which consists of M consecutive sub-carriers during N long blocks. Distributed RU (DRU), which consists of M equally spaced non-consecutive sub-carriers during N long blocks. The granularity of the RU should be able to be matched to the expected minimum payload. The size of the baseline LRU and DRU is same and is denoted as SRU, which is equal to MxN, where M=25 and N is equal to the number of long blocks in a sub-frame. This results in the number of RUs depending on system
description: The Data Unit (DU) is a network function that manages Physical Cell Identities (PCIs) for New Radio (NR) cells within a gNB. It detects PCI conflicts and works with the Centralized Unit (CU) and Operation, Administration, and Maintenance (OAM) to resolve these conflicts by reassigning new PCIs or selecting from a list of configured PCIs.
explanation: The text describes DU's responsibilities in managing cell identities and resolving conflicts within a 5G network. This clearly defines it as a network function responsible for data transmission and management.
section_title: 5.2.2	Solution description
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