Question: In Mission Critical (MC) services, how does an MC service client estimate MBMS bearer quality when no data is currently being transmitted on the MBMS bearer (e.g., between MCPTT group calls)?
Option 1: By continuously transmitting test data over the MBMS bearer to gauge reception quality.
Option 2: Through implementation-specific methods, such as analyzing modulation and coding scheme (MCS) and measurements from reference signals from the eNB(s), or using metrics like RTP packet loss.
Option 3: By relying solely on feedback from the MC service server regarding the assumed quality of the MBMS bearer.
Option 4: This estimation is not possible without actual data transmission, so the client assumes optimal conditions until data is sent.
Explanation: In scenarios where no data is being transmitted over the MBMS bearer, estimating the bearer's quality requires indirect methods. This estimation can be done through implementation-specific approaches, including analyzing the modulation and coding scheme (MCS), measurements from reference signals received from the eNodeB(s) (eNB(s)), or even considering metrics like RTP packet loss when data transmission resumes.