MBMS Reception on Non-Serving Frequencies Without Cell Reselection
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently providing multimedia broadcast multicast services (MBMS) due to limitations in frequency usage, power consumption, and user equipment capabilities, which affect service availability and competitiveness.
Innovation Solution
A method for user equipment to receive MBMS services by prioritizing frequencies and utilizing carrier aggregation and multiple radio access technologies, allowing reception on non-serving frequencies without camping on them, and managing RRC connections to optimize service continuity and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment camps on a different frequency to receive MBMS service, then MBMS service availability is improved, but device complexity and power consumption increase due to frequency switching and cell reselection procedures
Solution Approach 1:
The network pre-configures MBMS service frequency information and reception conditions to the user equipment before the UE needs to receive MBMS services. This allows the UE to proactively know which frequencies to monitor and when to switch, eliminating the need for complex real-time cell reselection procedures and reducing device complexity while maintaining service availability
Solution Approach 2:
The network acts as an intermediary by providing centralized MBMS service information and frequency configuration to user equipment. Instead of UEs independently performing complex cell reselection procedures, the network mediates the process by delivering pre-configured frequency information, simplifying the UE's task and reducing device complexity while ensuring service availability
2Duration of action of moving object
If user equipment performs cell reselection to access MBMS service, then service continuity is improved, but loss of time and signaling overhead increase
Solution Approach 1:
The network provides pre-configured MBMS frequency information and reception timing to user equipment in advance. This allows UEs to maintain service continuity without performing time-consuming cell reselection procedures, as they already know which frequencies to monitor and when to switch, thereby reducing loss of time while maintaining service continuity
Solution Approach 2:
The system dynamically adapts by allowing user equipment to flexibly switch between receiving MBMS services on the current frequency or switching to a different frequency based on pre-configured conditions. This dynamic approach enables service continuity without requiring full cell reselection procedures, reducing the time loss associated with rigid frequency switching
3Adaptability or versatility
If user equipment receives MBMS on non-serving frequency, then service availability is improved, but use of energy increases due to additional receiver operations
Solution Approach 1:
The system applies local quality by enabling MBMS reception on non-serving frequencies only when and where needed, based on pre-configured network information. User equipment can selectively activate reception on specific frequencies for MBMS services rather than continuously monitoring all frequencies, improving service availability while reducing unnecessary power consumption
Solution Approach 2:
The network pre-configures MBMS service frequency information and reception conditions to user equipment before actual MBMS reception is needed. This allows UEs to proactively prepare for frequency switching only when necessary, avoiding continuous monitoring of multiple frequencies and reducing power consumption while maintaining the capability to receive MBMS on non-serving frequencies
Data Source
AI summary
A method for receiving MBMS (Multimedia Broadcast Multicast Service) service at a user equipment camping on a first frequency in a wireless communication system is disclosed. The method comprises receiving the MBMS on a second frequency without camping on the second frequency from a network, if being able to receive the MBMS on the second frequency while camping on the first frequency.