MBSFN Notification Mechanism for Overlapping Areas
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Solution Overview
Problem
Current MBMS notification mechanisms only support non-overlapping MBSFN areas, requiring a UE to read all MBMS control channels upon receiving a notification, leading to inefficient battery usage and increased power consumption.
Innovation Solution
Introducing notification mechanisms that allow a UE to distinguish between different MBSFN areas and their respective MCCHs, enabling the UE to determine whether to wake up and read a specific MCCH upon receiving a notification, by using unique or common M-RNTIs and broadcasting MBSFN area IDs and radio frame offset information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE reads all MBMS control channels upon receiving a notification, then all MBSFN area content changes are detected, but battery consumption increases
Solution Approach 1:
The patent segments the MBMS control channel information by introducing MBSFN area IDs to distinguish between different MBSFN areas. The notification mechanism is divided into area-specific components, allowing the UE to identify which specific MCCH corresponds to which MBSFN area. This segmentation enables the UE to read only the relevant MCCH for the specific MBSFN area where content changed, rather than reading all MCCHs, thus reducing battery consumption while maintaining notification reliability.
2Adaptability or versatility
If multiple MBSFN areas are supported per cell, then service coverage and flexibility improve, but notification mechanism complexity increases
Solution Approach 1:
The patent applies universality by using a common M-RNTI for all MBSFN areas within a cell, rather than requiring separate RNTIs for each area. The MBSFN area ID is included in the notification message itself, allowing a single notification mechanism to handle multiple MBSFN areas. This approach maintains flexibility and adaptability in supporting multiple MBSFN areas per cell while avoiding the complexity of implementing separate notification mechanisms for each area.
3Reliability
If the UE monitors all MCCHs periodically, then all service content changes are detected, but power consumption increases
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously determine which MCCH it needs to read based on the notification message content. The UE uses the MBSFN area ID in the notification to identify the relevant MCCH and reads only that specific MCCH. This self-service approach eliminates the need for the UE to periodically monitor all MCCHs, as the notification mechanism actively provides the information needed to locate the relevant channel, thereby reducing power consumption while maintaining reliable service content change detection.
Data Source
AI summary
The embodiments of the present invention relate to a method and arrangement in a telecommunication system, in particular to methods and arrangements relating to overlapping MBSFN-areas. A notification mechanism is introduced that allows a user equipment to distinguish notifications for different MBSFN areas and different MBMS Control Channels. The user equipment then knows already upon reception of the notification whether it has to wake up and read a specific MBMS Control Channel. The embodiments of the present invention thus support multiple MBSFN areas per cell while still maintaining the benefits of reduced battery consumption in the UE due to said MBMS notification mechanism.