MBMS Switchover Between PTP and PTM Modes
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Solution Overview
Problem
There is no specific method for switching from point-to-point (PTP) to point-to-multipoint (PTM) mode for multimedia broadcast multicast service (MBMS) transmission in existing technologies, which hinders efficient spectrum resource utilization and service continuity.
Innovation Solution
A switchover method and apparatus that notifies user equipment of the transition to PTM mode, ensuring successful bearer establishment, resource availability, and priority ranking, while providing relevant information such as MBSFN area, start time, and TMGI, allowing seamless switching from PTP to PTM mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PTP mode is used for MBMS transmission, then service continuity is maintained, but spectrum efficiency deteriorates when user count exceeds threshold
Solution Approach 1:
The patent implements dynamic switching between PTP and PTM transmission modes based on real-time user equipment count. When the number of UEs exceeds a predefined threshold, the system automatically transitions from PTP to PTM mode to improve spectrum efficiency, and vice versa. This dynamic adaptation resolves the contradiction by allowing the system to optimize for reliability when user count is low and for productivity when user count is high.
Solution Approach 2:
The patent changes the transmission mode parameter (from PTP to PTM) based on the user equipment count parameter. By monitoring the number of UEs and comparing it against a threshold, the system adjusts the transmission mode to achieve optimal balance between service continuity and spectrum efficiency. This parameter-based control mechanism enables automatic resolution of the technical contradiction.
2Productivity
If switching from PTP to PTM mode is implemented, then spectrum efficiency is improved, but service continuity may deteriorate during transition
Solution Approach 1:
The patent sends a notification message to user equipment before the actual transmission mode switching occurs. This preliminary notification allows UEs to prepare for the mode change, ensuring they can properly receive and process the switched transmission mode. By taking preliminary action, the system minimizes service interruption and maintains continuity during the transition from PTP to PTM mode.
Solution Approach 2:
The system monitors user equipment count and provides feedback to determine when switching is necessary. This feedback mechanism ensures that switching decisions are based on actual network conditions, allowing the system to maintain service continuity by only switching when truly necessary (when user count exceeds threshold) and to switch back when conditions change.
3Productivity
If mode switching method is established, then spectrum resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent implements an automatic mode switching mechanism that monitors user equipment count and performs switching decisions without requiring manual intervention. The system serves itself by automatically detecting when switching is needed and executing the switch, thereby improving spectrum resource utilization while avoiding the complexity of manual configuration and management.
Solution Approach 2:
The system uses feedback from user equipment count monitoring to automatically trigger mode switching. This closed-loop control simplifies the overall system architecture by using simple threshold-based decisions rather than complex optimization algorithms, achieving good spectrum utilization with minimal added complexity.
Data Source
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AI summary
The present document provides a switchover method and apparatus for multimedia broadcast multicast service (MBMS) transmission modes; the method includes the following steps: a network side notifying a user equipment (UE) that one or more MBMSs will be transmitted by means of a point to multipoint (PTM) mode, then transmitting relevant information of the one or more MBMSs to the UE. The present document ensures the continuity of the MBMSs which are being received by the UE during the switching process from a PTP mode to the PTM mode, and is easy to implement and operate.