Question: In E-UTRAN, where is the multiplexing function for E-MBMS Services located, and what interface is used to support its scheduling information?
Option 1: eNB MAC layer, with scheduling information sent via M2 interface
Option 2: MCE (Multicast Coordination Entity), with scheduling information sent via S1 interface
Option 3: eNB RLC (Radio Link Control) layer, with scheduling information sent via X2 interface
Option 4: UE (User Equipment) PDCP (Packet Data Convergence Protocol) layer, with scheduling information sent via Uu interface
Explanation: The correct answer is Option 1 because, according to the specifications, the location of the multiplexing function for E-MBMS Services is indeed in the eNB MAC (Medium Access Control) layer. Additionally, the scheduling information for this multiplexing is supported by signaling on the M2 interface, specifically through the "MBMS Scheduling Information" procedure. This setup ensures efficient management and transmission of multiplexed E-MBMS services across the network.