Question: What primary function does the channel coding scheme serve when encoding/decoding data and control streams between the MAC layer and the radio transmission link in a 5G NR system?
Option 1: To provide security encryption for user data and control signals.
Option 2: To ensure Quality of Service (QoS) through prioritization of traffic flows.
Option 3: To facilitate handover decisions between different base stations.
Option 4: To offer error detection, correction, and reliable transmission over the radio link.
Explanation: The correct answer, Option 4, highlights the essence of channel coding in ensuring reliable data transmission. This involves error detection (identifying errors), error correction (fixing errors), rate matching (adjusting data rates to match channel conditions), interleaving (rearranging data to mitigate burst errors), and mapping/splitting onto/from physical channels for efficient use of radio resources. These processes are crucial for maintaining the integrity and reliability of both user data and control information transmitted over the wireless link in a 5G NR system, aligning with the principles outlined in 3GPP specifications for robust wireless communication.