MBMS Interest Indication Message Transmission via CE Level Comparison
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Solution Overview
Problem
In 3GPP LTE systems, user equipment (UE) cannot determine whether it can receive a multimedia broadcast multicast service (MBMS) service after transmitting an MBMS interest indication message, leading to potential service denial even if the UE is capable of receiving it.
Innovation Solution
The UE determines its coverage enhancement (CE) level and compares it with the CE level of the MBMS service to decide if the service can be received, transmitting an MBMS interest indication message only if it can, thereby avoiding unnecessary handovers and RRC connection establishments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE transmits the MBMS interest indication message without determining service receivability, then the service availability is improved, but the reliability of service reception deteriorates
Solution Approach 1:
The UE performs preliminary determination of service receivability by comparing its CE level with the CE level information of the MBMS service before transmitting the interest indication message. This preliminary action ensures that the UE only indicates interest in services it can actually receive, thereby maintaining high service availability while ensuring reliable service reception.
2Reliability
If the UE determines CE level and compares it with MBMS service CE level, then the service reception reliability is improved, but the device complexity increases
Solution Approach 1:
The UE determines its CE level based on RSRP measurements and compares this parameter with the CE level information of the MBMS service. By using parameter comparison rather than complex service compatibility analysis, the UE achieves reliable service reception determination while minimizing processing complexity.
3Adaptability or versatility
If the UE transmits interest indication message for services it cannot receive, then the adaptability is improved, but the loss of time increases due to unnecessary handovers and RRC connection establishments
Solution Approach 1:
The UE performs preliminary determination of service receivability by comparing CE levels before transmitting the interest indication message. This preliminary action filters out services that the UE cannot receive, preventing unnecessary handovers and RRC connection establishments, thereby reducing time loss while maintaining adaptability in service selection.
Data Source
AI summary
Disclosed are a method for transmitting an MBMS interest indication message and a device supporting same. A method for transmitting an MBMS interest indication message, according to an embodiment of the present invention, comprises the steps of: deciding a coverage enhancement (CE) level of a terminal in a wireless communication system; receiving CE level information of an MBMS service of interest; comparing the decided CE level of the terminal and the received CE level information of the MBMS service and thus determining whether or not the MBMS service can be received; and, if it is determined that the MBMS service can be received, transmitting to a base station an MBMS interest indication message comprising information about an MBMS frequency of interest or an MBMS service of interest.