MBMS Carrier Selection for Mobile Device Power Optimization
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Solution Overview
Problem
In LTE-A wireless communication systems, mobile devices face inefficiencies in receiving multimedia broadcast multicast service (MBMS) data due to power consumption issues when receiving the same data on both dedicated and mixed component carriers, particularly for UEs that do not support dedicated carriers.
Innovation Solution
A method and apparatus for a mobile device to handle MBMS data reception by selecting one component carrier when the same data is transmitted on multiple carriers, informing the network of residual carrier capability, and prioritizing data reception to avoid excessive configuration and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network transmits the same MBMS service data on both dedicated carrier and mixed MBSFN/uni-cast carrier, then UEs with different releases can receive the service, but UEs capable of supporting both carriers experience increased power consumption
Solution Approach 1:
The patent applies local quality by allowing different UE types to receive MBMS data from different carriers based on their specific capabilities. Rel-9 UEs receive data only from mixed MBSFN/uni-cast carriers, while Rel-10 UEs can receive from dedicated carriers. This selective reception approach ensures each UE type operates efficiently for its specific release version, resolving the power consumption issue for Rel-10 UEs while maintaining broad compatibility.
2Productivity
If the network configures multiple component carriers for MBMS data reception, then data reception capability is enhanced, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the MBMS data reception process by separating carrier selection logic based on UE release version. The network transmits data on multiple carriers, but UEs are segmented into different reception groups (Rel-9 using mixed carriers, Rel-10 using dedicated carriers) based on their capabilities. This segmentation simplifies the device complexity for each UE type while maintaining the overall system's enhanced data reception capability.
3Reliability
If a UE receives the same MBMS data on multiple component carriers simultaneously, then data reception reliability is improved, but power consumption increases unnecessarily
Solution Approach 1:
The patent inverts the conventional approach by having UEs select a single appropriate carrier based on their release version rather than receiving from multiple carriers simultaneously. Rel-10 UEs are instructed to receive from dedicated carriers only, not from mixed carriers, which eliminates redundant reception of the same data on multiple carriers. This inversion of the reception strategy maintains reliability through appropriate carrier selection while eliminating unnecessary power consumption from duplicate data reception.
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AI summary
A method of handling multimedia broadcast multicast service, hereinafter called MBMS, data reception on multiple component carriers for a mobile device in a wireless communication system (10) is disclosed. The mobile device has a maximum component carrier capability indicating the maximum number of component carriers accessible for the mobile device. The method comprises the steps of receiving a broadcast message or a dedicated message sent by the network, obtaining information about the number of the component carriers configured for the MBMS data reception, from the broadcast message or the dedicated message (302), and sending a first message to inform the network of a component carrier capability indicating the number of the component carriers on which the mobile device is not configured by the network to receive the MBMS data (304). In another subject, when the same MBMS data is sent on multiple carriers, e.g. dedicated and non-dedicated, the terminal can select which one should be used, e.g. non-dedicated when the maximum number of component carriers is exceeded.