MBSFN MCCH Synchronization via Master Base Station Mediator
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Solution Overview
Problem
In LTE systems, synchronous transmission of MCCH information in an MBSFN area cannot be guaranteed, which affects the synchronization of system information across multiple cells in a multicast single frequency network.
Innovation Solution
A network device acquires MBMS service information, composes MCCH messages, and adds time and configuration information to an MBSFN MCCH Information message or MCH Information message, transmitting this information to base stations, which then synchronize the MCCH message transmission to user equipment based on the provided time and configuration details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If base stations transmit MCCH information independently in MBSFN area, then each base station can operate autonomously, but synchronous transmission of MCCH information across multiple cells cannot be guaranteed
Solution Approach 1:
The patent introduces a master base station as an intermediary that collects MBMS service information from the core network and distributes it to slave base stations. This mediator ensures all base stations receive identical MCCH information at the same time, achieving synchronous transmission while maintaining autonomous operation at the slave station level.
Solution Approach 2:
The master base station performs preliminary actions by pre-processing MBMS service information and preparing synchronization messages before distributing them to slave base stations. This preliminary preparation ensures that all base stations are ready to transmit MCCH information simultaneously, guaranteeing synchronization.
2Productivity
If multiple base stations transmit MBMS services concurrently in MBSFN, then spectrum utilization ratio is improved, but synchronization complexity increases
Solution Approach 1:
The patent segments the synchronization function by designating one base station as master and others as slaves. The master base station handles the complex task of collecting and processing MBMS service information, while slave base stations simply follow the distributed synchronization messages. This segmentation reduces individual device complexity while enabling concurrent transmission for improved spectrum utilization.
3Device complexity
If MCCH information is transmitted without centralized coordination, then network device complexity is reduced, but transmission consistency across cells deteriorates
Solution Approach 1:
The patent merges the information collection and distribution functions into a centralized master base station. All slave base stations receive identical MCCH information from the master, ensuring transmission consistency across cells. The master base station consolidates the complexity of managing transmission consistency, reducing individual device complexity while maintaining high transmission precision.
Data Source
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AI summary
A channel synchronization method, system and device in the multicast broadcast single frequency network are disclosed, which relate to wireless communication filed and are used to solve the problem of unable to ensure the base station to synchronously send the multi-points control channel (MCCH) message in the multicast broadcast single frequency network (MBSFN) region in the prior art. The specific scheme is: the network device in the MBSFN obtains multimedia broadcast multicast service (MBMS) service information and confirms the time resource and the frequency resource that bears MBMS service information. The network device sends the MBMS service information, the time resource and the frequency resource information to the base station in the MBSFN. The base station utilizing the time resource and the frequency resource sends the MBMS service information to the terminal via MBMS point to MCCH. Consequently the purpose that the base station synchronously sends the MBMS service message in the MBSFN is achieved.