Question: What does the Information Element (IE) 'SL-CP-Len' indicate in the context of Evolved Universal Terrestrial Radio Access (E-UTRA)?
Option 1: The type of modulation scheme used for physical channels
Option 2: The length of the Random Access Channel (RACH) preamble
Option 3: The bandwidth of the Downlink Shared Channel (DL-SCH)
Option 4: The cyclic prefix length in E-UTRA
Explanation: In E-UTRA, 'SL-CP-Len' indicates the cyclic prefix length, a guard interval before each OFDM symbol to mitigate multipath effects and inter-symbol interference. This is crucial for proper signal processing at the receiver end, ensuring reliable data transmission over the radio interface, especially in high multipath propagation environments.