LTE Group Communication Transmission Mode Selection
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Solution Overview
Problem
The existing LTE air interface resources are wasted when using the MBSFN transmission mode for group communication service data, as it is not suitable for scenarios where UE locations are centralized, leading to inefficient use of resources.
Innovation Solution
Determine the transmission mode based on UE requirements, switching between MBSFN and single cell multicast transmission modes depending on UE capability and location information, allowing GCSE service data to be transmitted within specific cells or areas rather than the entire SFN area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If MBSFN transmission mode is used for group communication service data, then coverage area is extended across multiple eNBs, but LTE air interface resources are wasted when UE locations are centralized
Solution Approach 1:
The patent applies dynamics by enabling the transmission mode to switch between MBSFN and single cell multicast based on real-time UE location distribution and service requirements. The MCE dynamically selects the appropriate transmission mode rather than using a fixed mode, allowing the system to adapt to changing conditions and optimize resource usage while maintaining coverage area as needed.
2Area of stationary object
If MBSFN transmission mode is used, then service coverage is expanded to multiple cells, but transmission efficiency decreases for centralized UE scenarios
Solution Approach 1:
The system dynamically adjusts transmission mode based on UE location distribution. When UEs are centralized in one cell, single cell multicast mode is selected for high transmission efficiency. When UEs are distributed across multiple cells, MBSFN mode is selected to expand service coverage. This dynamic selection resolves the contradiction between coverage area and transmission efficiency.
3Loss of energy
If single cell multicast transmission mode is used, then LTE air interface resources are saved, but service coverage is limited to specific cells
Solution Approach 1:
The MCE dynamically selects between single cell multicast and MBSFN transmission modes based on UE location distribution and service requirements. When UEs are concentrated in specific cells, single cell multicast is used to save air interface resources. When broader coverage is needed, MBSFN mode is activated to expand service area. This dynamic approach resolves the contradiction between resource efficiency and coverage area.
4Device complexity
If fixed MBSFN transmission mode is used, then system complexity is reduced, but adaptability to different UE scenarios decreases
Solution Approach 1:
The patent introduces dynamic transmission mode selection where the MCE determines whether to use MBSFN or single cell multicast mode based on UE location distribution and service requirements. This dynamic mechanism enhances adaptability to different scenarios while maintaining manageable system complexity through automated decision-making based on UE reporting information.
Data Source
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AI summary
The present disclosure provides a method, a system, and an apparatus for transmitting group communication service data. In the present disclosure, the LTE uses a multimedia broadcast and multicast service (MBMS) to transmit group communication system enabler (GCSE) service data, a multi-cell/multicast coordination entity (MCE) knows whether a multimedia broadcast single frequency network (MBSFN) transmission mode or a single cell multicast transmission mode is used to transmit the GCSE service data. Whether the MBSFN transmission mode or the single cell multicast transmission mode is used to transmit the GCSE service data is determined based on UE capability information and UE location information. When the single cell multicast transmission mode is used, the MCE instructs an eNodeB (eNB) to use the single cell multicast transmission mode to transmit the GCSE service data. The present disclosure saves LTE air interface resources.