Question: Which of the following accurately describes the direction(s) in which the E-UTRA – NR CELL RESOURCE COORDINATION RESPONSE message is sent between nodes capable of interacting for EN-DC (E-UTRAN-NR Dual Connectivity)?
Option 1: Only from eNB to en-gNB
Option 2: Only from en-gNB to eNB
Option 3: Both from eNB to en-gNB and from en-gNB to eNB
Option 4: Neither from eNB to en-gNB nor from en-gNB to eNB, but rather within the same node type
Explanation: The correct answer is Option 3 because the E-UTRA – NR CELL RESOURCE COORDINATION RESPONSE message can be sent in both directions (eNB to en-gNB and en-gNB to eNB) between nodes that are capable of interacting for EN-DC. This bidirectional capability allows for flexible coordination of cell resources between the different types of base stations (eNodeB for LTE and gNodeB for 5G NR) in a dual connectivity setup, enhancing overall network efficiency and user experience.