name: FEC
full_form: Forward Error Coding
context: be (pre-)configured with a set of CBR ranges to each of which is linked a CR-limit. When a UE finds its CR exceeds the CR-limit for the CBR range it currently measures, it must reduce its CR to not exceed the limit. How this is done is up to UE implementation, and can include increasing MCS to reduce resource occupation, dropping (re-)transmissions, etc. PPPP can also be (pre-)configured with a mapping to the UE's maximum permitted transmit power, the limitation on which acts to reduce the CBR measured by sufficiently distant UEs. PPPP is used as described in Clause 5.2.2 to aid distributed sidelink congestion control based on the relative priorities of traffic from UEs that consider occupying a given resource. PPPP and CBR can each also be (pre-)configured with mappings to ranges of values of transmission parameters, e.g. a range of MCS values, and/or a range of numbers of subchannels, etc. In this case, the UE has to choose its transmission parameters from within the range
description: Forward Error Coding (FEC) is a technique used in digital communication systems to detect and correct errors that occur during data transmission. In the context of 3GPP TS 25.803, FEC decoding is performed at the end of the Transmission Time Interval (TTI) after combining receptions from multiple cells using various methods such as Maximum Ratio Combining (MRC), Selection combining method 1, or Selection combining method 2.
explanation: FEC is classified as a Technology because it is a specific method used to enhance the reliability and accuracy of data transmission in communication systems. The description details its application within a cellular network standard (3GPP TS 25.803) and its integration with techniques like MRC for improved reception.
section_title: 5.5.1.3.2		Coverage with Macro-Diversity / Simulcast Combining
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