name: OCNS
full_form: Orthogonal Channel Noise Simulator
context: as sequence of digits of type Integer(0..9), IMSI shall in the formula above be interpreted as a decimal integer number, where the first digit given in the sequence represents the highest order digit. For DS-41, i.e. "IMSI (DS-41)" is given as octet string, IMSI shall in the formulae above correspond to the decoded decimal representation of the IMSI-S part included in the octet string (see TIA/EIA/IS-2000-5). For example: IMSI (GSM-MAP) = 12 (digit1=1, digit2=2) In the calculations, this shall be interpreted as the decimal integer "12", not "1x16+2 = 18". "Index of selected SCCPCH" identifies the selected SCCPCH with the PCH and the uniquely associated PICH to be used by the UE. If the UE has no IMSI, for instance when making an emergency call without USIM, the UE shall use as default number IMSI = 0.
description: The Orthogonal Channel Noise Simulator (OCNS) is a technology used for simulating channel noise in High-Speed Downlink Packet Access (HSDPA) receiver testing. It is defined by the 3GPP specification to assess the performance of HSDPA receivers under various conditions.
explanation: The context describes OCNS as a tool for simulating channel noise, a process inherent to technological advancements in communication systems. Its role in assessing HSDPA receiver performance within the 3GPP framework further solidifies its classification as technology.
section_title: C.5.2	OCNS Definition
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